Steve is humming to "Camptown Races" when he opens the door to see his gangster cousin, Cornelius aka OGD from Detroit. He greets him, but Urkel uses the door and tries to keep him out of the Winslow house(ala the Winslows in the opening credits of season 4-7 when they tried to keep him out of their house). Eventually, OGD is able to get in the house and claims he wants to hang out with Steve. However, Urkel isn't fooled by his ruse and tells him that he knows why he's really here, he wants money. OGD says 4 gs and Steve goes balistic by saying $4,000. OGD mentions he's in a lot of trouble with a tough guy in Detroit named, Fresh Squeeze, because he loaned him some money to buy a new stereo. Even though he paid him back 20%, Squeeze wants more than that. Steve tells him that Fresh Squeeze is a loan shark who only cares about money. OGD mentions that if he doesn't have the money, Squeeze will cream him. Urkel tells him he's going to figure that one out on his own, because he's leaving to see their Uncle Omar Urkel in his nuclear submarine. OGD asks him if he can stay at the Winslow home to hang out while he's gone. Steve refuses and tells him he can't stay there even when he's there. He kicks him out as they head out. OGD ignores his cousin's warning to stay away and hangs out at the house, listening to rap music.
Laura heads home first and mistakes OGD for Steve before she finds out that he's Urkel's cousin. Eddie and 3J are impressed by the way OGD is dressed and his music choice. They let him stay at the house, even though Urkel refused to have him there. However, Laura, Carl and Harriette are not that impressed by him. Laura isn't impressed because he has his nickname on his arm and prefers to have men who has their names on their credit cards.
OGD and 3J are playing around with each other when Carl comes home from another hard day of fighting crime. He doesn't like him immediately, because of the way he dresses and has given 3J a rap CD, which include lyrics that insults police officers. OGD tells that doesn't he want the kid to hear the truth. Carl sends 3J to bed and confronts him about what he did. He tells OGD that he isn't his son so he can't tell him how to dress and what kind of lyrics to listen to, but as long as he's staying in his house as their guest, his music is off limits. OGD accuses him of censoring his freedom of speech. Carl tells him that he can say whatever he wants to outside his home. However inside his house, he won't tollerate disrespect and is proud of his job. OGD provokes his anger by telling him that police officers does't protect anyone when they're harrassing him. Carl tells him that if he hasn't been dressing up as a thug, he wouldn't be treated like one. He immediately kicks OGD out, before leaving for some fresh air. Harriette immediately sets him straight that when he's staying here, he needs to drop his attitude out the door.
Carl comes home three hours later calm, but still steamed about OGD insulting him in the living room. Harriette reveals that she has called his grandmother in Detroit and he asks her if her name is UPS. Harriette tells him that she's a very sweet lady and she told her a lot of interesting things about OGD. She mentions that he's a good kid, but has a rough life. Carl tells her that he's a thug and he hates police officers. Harriette also admits that back in Detroit, the police are considered the enemy, therefore OGD doesn't trust them and hasn't had the advantages of seeing cops in a good way like their kids did. She tells him that he can change all that by proving to him that most police officers are honest and decent people. Carl is worried that OGD will end up as a negative influence on both Richie and 3J. Harriette tells that instead of worrying about him being a bad influence on the kids, she tells him to hope that they rub off on him.
In the living room, Carl is reading a magazine when the doorbell rings. He's immediatly confronted by OGD's loan shark, a tough thug named, Fresh Squeeze. Squeeze claims that he's looking for him because he's late for his payment. Carl claims that OGD isn't his son, but he convinces the thug to let him take him to where he is. Fresh Squeeze agrees and leaves with Carl, not realizing the trap that was set up for him.
At the Sizzle Club, Laura, Maxine, Edie and OGD are there watching Missy Elliott's performance. Later on, OGD intercept a call on Laura's cellphone from her boyfriend, Stefan, and he's rude to him. This causes Stefan to call Steve on his uncle's nuclear submarine. Urkel tells him that their cousin was there a few days ago asking for money and he wanted stay at the Winslow house, but he kicked him out. Stefan tells him that he should've a better job keeping him out of Chicago because he's back and hitting on Laura and Myra. Urkel is upset because of the revelation and accidentally fires a missle. After that was done, Steve and Stefan confrence calls OGD, which annoys him. Urkel calls him by his real name, Cornelius Eugene Urkel, which he hates. Steve demands that he leave Laura and his girlfriend alone and returns to Detroit at once. Stefan mentions that he can go back in a bus or in a box, that's up to him. OGD claims that big talk coming from him in Milan. Urkel corrects OGD by telling him that he's not in Milan and that he'll be back tomorrow morning to deal with him.
In the kitchen, Laura tells Carl that she had a great time listening to Missy Elliott's performance live at the Sizzle Club and kisses him. Then, she bids good night to OGD by reffering to his real name. Carl mentions he has Fresh Squeeze come by the house, which made him real nervous. OGD claims he's not safe anywhere from Squeeze, but Carl tells him that he's safe here and mentions that he won't bother him anymore. OGD asks him if he paid him any money he was looking for. Carl mantions he did something better than that, he has arrested him and locked him up in his own cell. When OGD asked why he did that for him. Carl admitted that he recognized Fresh Squeeze because he was running illegal operations in Chicago and immediately left for Detroit when they issued a warrant for his arrest. OGD asks him how he got the drop on Fresh Squeeze because he's a dangerous man. Carl told him that he was taking Squeeze to see him, but along the way, he made a detour from the Sizzle Club to the precinct. He wished that OGD saw the look on Fresh Squeeze's face when five officers surrounded his car and said surprise. OGD is impressed and apologizes for all the things he said about police officers harrassing him. He tells him that he'll be gone by tomorrow, but Carl convinces him to stay a bit longer.
At the end credits, 3J begs OGD to stay because he wants to learn a lot more from him. However, he gives 3J some good advice in a positive light, by telling him that all he needs is right in the Winslow house because he has a loving family who'll treat him right and that's all it matters. Steve comes home and wants payback against him for messing around with his girlfriend, Myra, while he out of Chicago in their uncle's nuclear submarine. Instead of fighting with Urkel about what happened, OGD apologizes for what he did and heads out. Steve ends up embarrassing himself further with peace lines.