After her sister's murder, Nic, her younger sister, and two friends seek solace through a Pacific island kayaking adventure. Hours into the trip, the women are stalked by a shark and must band together, face their fears, and save each other.

A group of friends set out on a boating trip, but their adventure quickly turns into a nightmare when their boat capsizes and they find themselves stranded in the middle of the ocean. As they struggle to survive, they soon realize that they are not alone in the water - a giant shark is hunting them down one by one.