一群大学时的老朋友在加勒比海潜水之旅中重聚，探索二战战舰的残骸，发现自己被困在由大白鲨包围的生锈金属水下迷宫中。

　　For her first day of orientation, Dr. Tristian Mackenzie makes her way to the Silverdale Psychiatric Hospital for the criminally insane, where she learns of the s…

　　When their stolen jetski's break down a group of spring breakers come under attack by a great white shark.