Twenty years ago, there was a serious gas explosion in the mining town of Novascotia, killing almost all the workers in the mine. The accident was caused by the fact that the person in charge left his post to attend the Valentine's Day ball, leaving no one to supervise it. A year later, Harry Walden (Peter Cowper), the only survivor of the tragedy, kills the head of the mine and is then forced to be sent to a mental hospital. But Harry left a curse when he left, and the town will no longer hold a Valentine's Day dance. Twenty years later, a group of young, bold and unscrupulous young people couldn't stand the boring Valentine's Day, and they decided to bring the long-lost dance back to town. And with the return of the ball, there is also a cruel and bloody killing.