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.

Plagued by a violent recurring nightmare, college student Stefanie heads home to track down the one person who might be able to break the cycle and save her family from the grisly demise that inevitably awaits them all.

Courtney Whitmore, a smart, athletic and above all else kind girl, discovers her step-father has a secret: he used to be the sidekick to a superhero. "Borrowing" the long-lost hero’s cosmic staff, she becomes the unlikely inspiration for an entirely new generation of superheroes.

New to town, a bullied teenager discovers a doll, riddled with pins, in her backyard shed. She soon comes to believe that the doll holds supernatural powers.

In early 1970s Florida, an ominous white van stalks young women. A teenage girl is the latest victim, but this one won't stay a victim.