Keegan Dark returns to the the heart of California's winery valleys to make peace with his long-estranged family. Instead, he finds a harrowing mystery that endangers his family's lives and livelihood.
When terrorist action releases a secret government virus in the Houston Federal building, the employees become aggressive and homicidal. Federal officials quarantine the building to wipe out the infected and control the story, but a small group of uninfected are fighting to get out.
Tyler is convinced by his girlfriend Sarah to take her on a camping trip with Tyler's stepfather and stepbrother Chase to try and renew the familial bonds. With tensions already running high between the estranged stepbrothers, the feuding is exacerbated by unusual sounds and strange news reports.