Iraq War veteran Sgt. William Hightower goes to extreme measures to get authorities to investigate the disappearance of several people in Detroit, Michigan, one of those people being his sister Lee. The reason why the Detroit Police Department did not originally investigate is because those missing are exclusively people who live on the streets, specifically those that call the streets of the Cass Corridor home. Despite Hightower's action potentially landing him in jail, he gets his wish in that the BAU are brought in to investigate. The BAU's investigation brings them into Canada. Although they are there on the invitation of the RCMP, the BAU face the obvious problem of jurisdiction. When they get to the site and person they believe the unsub, they are initially dumbfounded due to the unsub's physical state. But he may know more than at first glance, which they will have to get out of him before the latest missing person, a young woman named Kelly, is found dead. This case is especially difficult for Hotch, who may need to unwind with a drink when he gets home. However, others things are waiting for him when he arrives.