When a Category 5 hurricane is poised to hit their coastal Florida town, the Davies family takes refuge in their waterfront manse. Marlowe, Lee, and their teenage twins invite their close friends to wait out the storm in comfort and style.

Uninvited are the three strangers who dock on the family's shore right before the storm descends. Brothers Jason and Bo--and Bo's girlfriend, Darcy--are a charming, helpful trio in need of a safe haven that the family is only too happy to provide.

But as the storm outside grows more threatening, so does the tension in the house.

Soon, the lines between family, friends, and strangers blur. Danger mounts with every pointed finger and broken confidence, and long-held secrets are revealed one after another until only one truth remains: not everyone is going to make it out alive.