In 1969, three high school footballers tried to drug and kidnap their prom night dates. Their plan works with two of the girls but the third, Mary Banner (Lillith Fields), tries to escape. The football captain chases her into a storage room and punches her, knocking her out. Unable to revive her nor able to hear her heartbeat, he believes Mary to be dead. Panicking, he locks her body in an old trunk.