Alexandra reluctantly tags along for Slasher Sleepout, an extreme event that is part camping trip, part haunted house, and part escape room. But when the fun turns deadly, Alex has to play the game if she wants to make it out alive.

七个高中朋友相约来到一个古堡里，他们把灵魂出卖给了500年前的魔鬼，然后他们陷入了一场血腥的厮杀...