At Leena's bed & breakfast, Pete and Myka are working on reports and Pete finishes first, boasting that he won. Artie explains that the reports are going to someone above Mrs. Frederic. He leaves them to have a day by themselves and says that Claudia is doing chores in the warehouse.
At the warehouse, Claudia is working on a self-directed vacuum cleaner and uses an artifact snow globe to cool her pop. As she goes out to lubricate the zip line, the vacuum cleaner runs out of control and hit the switch, sending Claudia out into the warehouse. She ends up suspended in the middle of the building but the vacuum cleaner hits the eject line and Claudia drops into the shelves releasing silly string and a dodge ball. The silly string gets into the gear mechanisms below the floor at the neutralizer processing center.
Pete and Myka wonder who are getting their reports and come to find Claudia. They spot artifact disturbance reports on the security screen and realize things have gone amiss.
Artie meets with the courier and asks him to pass a message on to his superiors. The man refuses to talk and leaves. However, Mrs. Frederic's bodyguard arrives and says that she wants to have a word.
As the neutralization system shuts down, Pete and Myka look for Claudia and find the dodgeball. It starts multiplying, and every time they look away, the balls multiply and attack them. The agents try to back away without taking their eyes off the balls. They run for a neutralizer station but discover that the system is empty. They look for useful artifacts but don't find anything, and Pete suggests that they catch the dodgeballs to neutralize them. Myka looks away and Pete catches them.
Artie meets with Mrs. Frederic at a local diner and she asks about the mission in Paris even though she already knows about them.
Pete and Myka continue their search and notice the energy discharges are increasing in Pete climbs up a ladder and spots a building with a Claudia-shaped hole in the roof. They investigate and realize it's Leena's house. They go inside and Claudia finds them and tells them not to close the door… too late. When Pete opens the door, he realizes he's in a fourth-dimensional tesseract and all the doors lead back to other doors within the same house.
As the neutralizer dispersal system reaches critical mass, Mrs. Frederic continues to pursue her interrogation of Artie. Artie notices people leaving and the owner closes the diner. Everyone else in the diner turns out to be Mrs. Frederic's superiors, the Regents. The supervisor, Benedict Valda, explains that the Regents are just normal people, and having kings and presidents controlling the warehouse would lead to chaos. Valda begins questioning Artie, noting that Pete and Myka have destroyed one artifact and released a malevolent spirit from the Lewis Carroll mirror. When Artie defends them, Mrs. Frederic explains that it's Artie and his former partner MacPherson that are under investigation.
Claudia and the agents try to work out why the house is in the warehouse. They realize that the artifact is in the original house and they had to move the house and then rebuild the building. Myka spots a painting of the room that isn't in Leena's current B&B. It's fused to the wall and can't be moved. The painting changes as they move objects into the room, to reflect the new room. Pete draws a door on the picture and it appears on the wall. However, it leads back into the house just like all the other exits. Pete throws something at the painting in exasperation and the walls reverberate with the shock. He rips a hole in the painting and a hole rips open in the wall, providing them with the way out. However, when they find that a storm is brewing up at the ceiling.
Claudia reveals she's been setting up access terminals throughout the warehouse. They determine the processing center has jammed and if they don't restore the flow within 30 minutes, it'll blow up. The most direct route is through the Dark Vault but Pete says Claudia should stay there. Myka agrees with her and Pete gives in.
At the diner, Valda continues the interrogation on non-MacPherson issues and Mrs. Frederic advises Artie to go along. Artie agrees that he helped Claudia based on his promise and Valda notes that he's letting his personal issues interfere in warehouse affairs. When Mrs. Frederic notes that Artie's recovery rate has been sterling, Valda asks why Artie involved Dickinson in top secret affairs. Artie insists it was necessary but Valda warns that his future is at stake.
Claudia and the agents enter the Dark Vault, which has a sign warning that the artifacts are sense-activated. Purple containment fields running off of back-up generators keep all of the artifacts contained, and the generators cut off. They get to the opposite side and Claudia tries to open the lock. As he waits, Pete notices a doll and it comes to life on him. He backs up into a typewriter that starts typing on its own. Claudia gets the door open but Myka realizes that Pete has been entranced by the typewriter. The vault door closes automatically, trapping him inside.
As the storm continues to build, Myka tries to get Pete's attention while Claudia works on the lock. Mrs. Frederic's automated voice recording comes on to order an emergency evacuation. Myka finally kicks the lock and shatters it, getting the door open. They notice there's a cirPete and Myka are at Leena's bed & breakfast finishing their reports. Artie stops by to pick them up and turn them over to the courier. When Myka wonders where they're going, Artie explains that someone above Mrs. Frederic will be reading them. As he leaves, he wishes them a good time on their day off and tells them that Claudia is doing chores at the warehouse.
At the warehouse, Claudia finishes repairing the self intelligent auto-vacuum and cools off her pop with a snow globe artifact. She then goes to work lubricating the zip line but the vacuum cleaner hits the switch, sending the harness and Claudia out into the warehouse. It hits the eject switch and the line detaches, sending Claudia swinging across the crates. Among the artifacts she knocks loose are a can of silly string and a dodgeball. The silly string can rolls through a grate and lands in the gears responsible for delivering neutralizing fluid throughout the warehouse.
Pete and Myka go to the warehouse to find Claudia and notice the alarms coming up. There are artifact disturbance reports throughout the warehouse and they go to investigate.
Artie drives into the nearby town and hands over his report to the courier, who quickly drives away. However, Mrs. Frederic's bodyguard mysteriously appears on the street and tells Artie she wants to meet him at a nearby diner.
The neutralization system starts to shut down as Pete and Myka look for Claudia. Instead they find the dodgeball, and discover that every time they look away, it hits them and multiples. Then when they look away, all the multiples hit them and multiply again. They grab a hose from a nearby neutralizer station but discover the system is jammed up. Pete finally figures out how to stop them: he has Myka look away and then catches the initial dodgeball. He's buried beneath a wave of dodgeballs but manages to grab the original and the others are sucked back into it.
Artie finds Mrs. Frederic ordering a steak and pie at the diner. She starts asking him about the team's recent missions, even though she already his previous reports.
As the energy discharges in the warehouse grow larger, Pete and Myka finally spot a Claudia-shaped hole in a house that is an exact duplicate of the B&B. They go inside and let the door shut... just as Claudia comes downstairs and tells them not to let the door shut. When Pete tries to go out, he discovers that every door he goes through just leads back into the house and there's no escape.
Mrs. Frederick continues to interrogate Artie. After a couple of patrons leave, the owner closes the diner and Artie realizes that all of the remaining customers are the Regents, Mrs. Frederic's mysterious superiors. The spokesman, Valda, explains that they're just normal people, not rulers or politicians, and takes up the interrogation of past cases. However, Artie soon realizes something else is going on and Mrs. Frederic tells him that it's Artie himself that is under investigation.
Pete, Myka, and Claudia figure out that the house they're in is the original B&B, and some artifact inside of it couldn't be removed so the entire house was transported to the warehouse. Leena's B&B was then built to replace the original. Realizing the original must have some artifact in it that the new version doesn't, they search and find a painting fused to the wall. It shows the living room of the house, and they work out that if anything changes in the room, it changes in the picture as well. Pete reverses the procedure and draws a door in the wall. However, it also leads back into the house. Pete throws his marker at the painting in disgust and they notice that the walls of the house reverberate the same way the painting does. They rip a hole in the painting and a hole opens in the wall, leading back to the warehouse. However, when they get outside they discover that the electrical discharges have created a vast storm inside of the warehouse.
Thanks to Claudia's foresight, the trio is able to access Artie's office from an emergency access terminal she set up. They discover that the neutralizer processing center is malfunctioning and they have 30 minutes before the warehouse blows up. The only way to get to the processing center in time is through the center of the warehouse... and the Dark Vault, containing the most dangerous artifacts. Claudia insists on going despite the danger and Myka backs her.
At the diner, Valda continues the interrogation and notes that Artie lets his personal issues get in the way of enforcing warehouse policy. He also accuses Artie of bringing in Daniel Dickinson, endangering the shroud of secrecy around Warehouse 13. Artie continues to defend himself but Valda warns that Artie's future is at stake.
The trio gets to the Dark Vault and Claudia defeats the Omega level security lock. Inside, purple containment fields hold the most dangerous artifacts, which are sensory-activated. They get to the other side as the back-up generators go off-line and the containment fields drop. As Claudia tries to get the opposite door open, Pete notices a doll that comes to life on him. He backs up into a circle on the floor drawn around a stand with a typewriter on it. Pete stares at it... and keeps staring at it. Myka realizes something is wrong just as they get out and the door closes behind them. When Claudia is unable to open the lock, Myka kicks it, short circuiting the mechanism. Inside they discover that the typewriter belongs to Sylvia Plath, and drains the will to live from anyone who gets to close. Pete is too depressed and despondent to leave the circle on his own and Myka can't reach in without being affected. Myka sends Claudia on ahead to the processing center, insisting she trusts her, while she tries to free Pete.
Artie has enough of questions and tells the Regents that the focus needs to be on MacPherson, who is a danger to them all. Valda points out that Artie is becoming just as bad as MacPherson, breaking the rules, but Artie insists that MacPherson knows the rules and the only way to beat him is to break some rules of their own. Artie finally realizes that the Regents are afraid of MacPherson. He tells them to either get rid of him or get out of his way and storms outside. Mrs. Frederic says that the Regents have to make the next move.
When Pete refuses to let Myka save him, she grabs a broom and shoves him out of the containment circle. Meanwhile, Claudia gets to the processing center and, wearing neutralizer gloves, starts pulling the silly string out of the cogs. However, when she takes off her gloves to get a better grip, she discovers the stuff sticks to her hands... and won't let go. With five minutes left, the mechanism starts to pull her in.
While Pete recovers, Myka goes on ahead and finds Claudia stuck. She tries to free Claudia and gets stuck as well. Pete arrives and looks for something to cut the string. With less than a minute left, Claudia tells him to use the snow globe in her purse. Pete uses it to freeze the silly string and then shatter it with a hammer blow. The gears start turning, pumping the neutralizer fluid and stopping the explosion.
Outside the diner, Artie is waiting to hear what the Regents decide. Mrs. Frederic comes out to tell him that they're letting him stay on, in part because of her insistence that Artie is the best agent they have. As she leaves, she wishes Artie good hunting.
As Claudia finishes repairing the auto-vac and Pete cleans up, Claudia thanks Myka for believing in her. As they talk, Pete comes in and assures them that everything's cleaned up and Artie won't notice a thing. Artie comes in and wants to know what it is he won't notice. The trio tries lying but Artie figures something is going on and forces them to explain. However, he assures them that it's happened to him in the past and he cut it even closer to total meltdown. As they leave for Mexican, Artie mutters under his breath that they'd better enjoy their time off, because they're going to need the rest.
cle on the floor around the typewriter stand. Myka realizes the typewriter belonged to Sylvia Plath and drains the will to live from anyone who looks at it. Myka tries to get him to leave the containment circle but Pete doesn't see the point. Myka tells Claudia to go to the processing center while she deals with Pete.
Artie finally snaps and says the interrogation is a waste of time. He insists that MacPherson is out there and has something horrendous planned. He tells the Regents to deal with it but Valda points out that Artie is using MacPherson's supposed threat to justify his own rule-breaking. Artie points out that MacPherson knows the rules and he'll have to break the rule to stop him, but then realizes the Regents are afraid of MacPherson. Artie tells them to fire him, kill him, or let him do their job and then leaves. Once he's gone, Mrs. Frederick says that the ball is in the Regents' court.
Myka throws her belt to Pete but he refuses to grab it. She dares him to win but that doesn't work either. Finally Myka grabs a broom and shoves him out of the containment circle. Meanwhile, Claudia gets to the neutralizer processing center with five minutes to spare. She starts pulling the silly string out of the cogs. However, when she pulls off her neutralizer gloves to get a better grip, the silly string sticks to her hand and the cogs start pulling her in. Myka leaves Pete behind to recover and finds Claudia. She gets entangled as well and Pete arrives and tries to find something to cut the silly string. Claudia directs him to the snow globe in her purse. He takes it and freezes the silly string, and then breaks it with a hammer. The cogs start up and the neutralizer fluid is pumped throughout the warehouse, abating the emergency.
Artie is sitting outside the diner when Mrs. Frederic comes out and tells him the Regents are letting him stay. As she leaves, she wishes Artie good hunting in tracking down MacPherson.
At the warehouse, the vacuum cleaner is still running until Claudia shuts it down. She thanks Myka for trusting her and Myka admits that she's talented. As they bond, Pete arrives and they figure Artie won't notice. Artie arrives to ask what he won't notice and they claim they're planning a surprise party. He isn't fooled and they have no choice but to explain. Artie takes it calmly enough, noting that he's had a similar experience in the past. The trio goes for Mexican and Artie asks them to bring him a taco. Once they're gone, he tells them they're going to need their rest.