An ancient Aztec whistle sets off a chain of bloody events at Pellington High. Whoever blows it – or hears its piercing sound – is doomed to a horrific death. New student Chrys, who has just moved in with her cousin Rel, teams up with the kind-hearted Ellie to stop the curse, but for some of their friends help comes too late. Corin Hardy (THE HALLOW, THE NUN) delivers a creepy gore fest for fans of classic U.S. horror.