Two families without any obvious connections are found murdered in Iowa. The MOs are similar, so the BAU is called to investigate before another family is killed.
"All humanity is one undivided and indivisible family. I cannot detach myself from the wickedest soul." Mahatma Gandhi
Ellie Spicer shows up at Quantico from Los Angeles and tells Morgan that she doesn't want to stay with her foster family. As the BAU leaves for the Midwest, Morgan asks Garcia to take care of Ellie.
The team determines the killer apparently had been invited into the home and had eaten dinner with the family and then allowed to sleep in the same house. It appears as though both families had known the culprit. Prentiss and Hotch think the unsub is targeting the women specifically.
After a reverend is found murdered in his truck on the side of the road, the profile become clear. The unsub appears to be vulnerable and people readily offer to help. He might be a young teenager.
The unsub (Jeremy) meets a woman (Nancy Riverton) and her two children at a rest stop and gives them a fake story about how he came to be there. Nancy thinks the best thing to do is to take him to the police station, but her children convince her otherwise, so Nancy invites Jeremy to stay with them.
Morgan discovers that Ellie's foster mother didn't even realize that she had run away. Morgan requests that Garcia start the process for moving Ellie into the Virginia Child Protective Services system.
Reid narrows down the list of suspects to 33 boys who were made wards of the state by the Safe Haven Law, which allows anyone to drop off a minor under 18 at a hospital with no questions asked. The first victim had worked at a hospital.
Nancy asks Jeremy for his mother's number so that she can call her. He gives her the phone number for his first victim and Nancy leaves a message on her answering machine.
The team arrives at the first victim's house and discovers the message, which leads them to Nancy's house. They find her children tied up and learn Nancy left with Jeremy. They are headed to Jeremy's mother's house, but Jeremy tells her to stop before they get there because he doesn't want her to know where he lives. He stabs her before he leaves the minivan.
Jeremy arrives at his mother's house, while Garcia pulls up suspicious ER visits and finds a file on nine-year-old Carrie Sayer, who had suffered a fractured arm by her brother, Jeremy. The team manages get to the Sayer home there before Jeremy kills his mother.
Back at Quantico, Ellie's mother arrives, but Ellie doesn't want to see her. Morgan convinces her that she should give her mother another chance.
"But I have promises to keep, and miles to go before I sleep, and miles to go before I sleep." Robert Frost