When victims are found in Philadelphia in a similar style to victims of The Replicator, the stalker who has been tracking the BAU's every move, the team thinks this could be the break they need to try and apprehend him.

The BAU goes to Morgan's old neighborhood in urban Chicago in search of an UnSub targeting middle-aged men, and a clue leads Morgan to believe that they are after someone connected to the man who molested him as a child.