Description: Four teenage girls (Corinne Foxx, Sistine Stallone, Sophie Nélisse, and Brianne Tju) 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.