When parents Janet and Sean leave for a much-needed weekend getaway, masked men bypass their high-tech home security system to hold their teen son hostage. Under threat of losing their son, the couple follow a series of cryptic instructions that land them at Janet's office with one final order: to kill her boss.

A group of young adults spend the weekend at a friend's house by the lake. Joined by the local sheriff, the group encounters an escaped convict Native American chief, a copycat killer and the return of the terrifying masked killer, Damon.