After losing her memory in a bizarre accident that kills most of her classmates, Alma tries to unravel what happened that day — and regain her identity.

A high school class attends a retreat on a mountain, but on the way home, a horrific accident occurs with both fatal and inexplicable consequences.

A young man and his four younger siblings, who have kept secret the death of their beloved mother in order to remain together, are plagued by a sinister presence in…