1982: The survivors of a series of brutal killings in a small town thought mass murderer Alex Black was dead and buried after the townspeople put an end to him. But teenagers experimenting with the occult awaken the monster from his grave and he begins another rampage of terror with his favorite tool, a pickaxe. Only those who have faced him before have any chance of stopping Alex Black once and for all.
Kate attends her estranged sister's bachelorette party at the request of their dying father. The weekend, held at a remote cabin booked on a home sharing app, turns into a savage life-or-death struggle that pits family against family, and past against present.