The Forgotten squad looks for the killer of an 8 year old girl (who died five years ago), and has to match their wits against a multiple child murderer who likes to leave clues in the form of puzzles...

A mysterious young man knocks on The Forgotten Network's door with a most unusual request -- 'help me find my identity.' After a violent assault put him in a coma, John Doe has no recollection of who he is. During the investigation, the team tracks the Doe's past to a world of crime, where a member of their team is nearly killed. But who is John Doe? Why hasn't anyone come forward to identify him? And was it this dangerous lifestyle that led to John Doe's assault.