Twenty years ago, a tragic accident ina mine on St. Valentine's Day took the lives of five miners. The disaster occurred while supervisors left their post to attend the town's annual Valentine's Day dance. The only survivor, Harry Warden, was confined to a mental institution after the ordeal.On the disaster's first anniversary, he returned to thetown for bloody revenge. That was nineteen years ago, and memories have dimmed. Young lovers T.J. (Paul Kelman) and Sarah (Lori Hallier) and friend Axel (Neil Affleck) are among the townspeople attending another Valentine's party.Then, a box of Valentine candy arrives, containing an ominous message and a blood soaked heart. Before the night is over, terror will strike again and again and again.