A woman goes missing, forcing her husband, daughter and sister to face what they've each overlooked.

When a charming stranger invites her to a party, a shy woman's fear of socializing turns into real terror.

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.