Everyone's primal fears of death and how horribly it can play out in your own mind.

A group of tech-savvy teens stream their wild party online. But when Brie (Alice Darling) wakes up, she's all alone. A sinister smiley message tells her that her friends are each trapped in separate boxes. They've all got their phones, but if anyone attempts to call the police or their parents, the penalty will be deadly.