In Scavenger, mystery writer Mark Stevenson has just published a bestselling novel based on a decade-old series of unsolved murders. The serial killer-known as "the Family Man"-murdered entire families, always on national holidays. Out of the blue, Mark is contacted by a stranger, calling himself "Scavenger," who claims to know the truth behind his fiction. Scavenger proposes that Mark play a game with him-a nationwide hunt in which Mark will revisit the original crime scenes, ultimately leading to unmasking the Family Man's true identity. Mark must find out, but he gradually realizes that the evil scavenger hunt is more complicated and deadly than he could ever have anticipated. It becomes a race against time to complete the game before more people are killed-including himself.