Four teenage girls go on a diving adventure to explore a submerged Mayan city. Once inside, their rush of excitement turns into a jolt of terror as they discover the sunken ruins are a hunting ground for deadly great white sharks. With their air supply steadily dwindling, the friends must navigate the underwater labyrinth of claustrophobic caves and eerie tunnels in search of a way out of their watery hell.
Vacation turns disaster when Houston grad Kyle and her friends survive a plane crash in the desolate Louisiana everglades, only to discover there's something way more dangerous lurking in the shallows.
Determined to gatecrash her ex-lover's funeral on glamorous French hideaway Île de Ré, former Hollywood siren Helen escapes her London retirement home with help of repressed English housewife Priscilla and they hit the road together in a race to get to the funeral on time.
