A group of unsuspecting high school students, considered outsiders by their peers, unexpectedly come across a mysterious and cursed artifact—the ancient Aztec Death Whistle. As they experiment with the eerie relic, they soon realize that blowing the whistle unleashes a haunting, blood-curdling sound that awakens a deadly force from the past. This malevolent entity is now destined to track down and claim their lives, turning their ordinary school days into a terrifying fight for survival.