Seven teens arrive for a school retreat – only to find an abandoned motel and a sinister text message waiting for them: I know what you did a year ago.
Each of the seven buried a guilty secret about their tragic school fire. And now someone is out for revenge.
Every hour they must choose the guiltiest one among them to cross over the white line that circles the motel and be killed. Otherwise, they all die.
But who deserves to live, and who to die? Because only one of them can survive..