A group of young people discover a mysterious artifact – an ancient Aztec whistle called the "Death Whistle." At first, they treat it as a curious curiosity, unaware that it holds a dark and bloody history. All it takes is one whistle to unleash a terrifying curse: anyone who hears the sound will soon come face to face with their own death. What initially seems like innocent fun quickly turns into a desperate fight for survival. More people die in gruesome circumstances, fear and tension mount, and the line between the worlds of the living and the dead becomes nearly invisible. The heroes must uncover the secret of the ancient object before it's too late...