18-year-old Tate Robinson should focus on having a relaxing winter break with his friends. Their parents all agreed to let them spend several days at Tate's family's lake house without adult supervision. Instead, someone wearing a scarecrow mask stabs Tate's friend, Elijah, on the second day of the trip.

Tate narrowly escapes the killer when he flees the woods and runs back to the house, rejoining his friends. To complicate matters, everyone discovers their smartphones are missing. Therefore, they can't call for help. Their phones were the only technology they brought because the trip was supposed to be a break from Senior Year stress.

Everyone remains at the lake house. At least temporarily. The body count starts rising after Elijah's death, though. So, if Tate and company want to survive the trip, they must uncover who's after them. And quickly.

Furthermore, Tate must deal with his former fling, Nick, who tagged along by showing up at the lake house uninvited. Tate and Nick were supposed to be taking a break...they wanted different things. Tate hoped to keep their relationship casual because he was afraid of getting his heart broken. Meanwhile, Nick craved a real relationship. But just because Tate and Nick could reconcile doesn’t mean they should reunite. With a killer on the loose, Tate can’t be too careful about who he trusts.