Twenty years ago in the sleepy mining town of Valentine Bluffs, a fatal mining disaster occurred on Valentine's Day while some of the crew was decorating for a party. The sole survivor of the accident killed the remaining crewmembers and warned the town not to celebrate Valentine's Day again. When a group of teenagers decides to defy that order, a murderous maniac in mining gear begins dispatching townsfolk in bloody and creative ways.

A decades-old folk tale surrounding a deranged murderer killing those who celebrate Valentine's Day turns out to be true to legend when a group defies the killer's order and people start turning up dead.

Tom returns to his hometown on the tenth anniversary of the Valentine's night massacre that claimed the lives of 22 people. Instead of a homecoming, Tom finds himself suspected of committing the murders, and it seems like his old flame is the only one that believes he's innocent.

At the snobby Crawford Academy, Virginia's group of friends start to go missing years after horrible events that happened to her as a child around her birthday.