Mutants threaten to overwhelm the last bastion of civilization left after the great apocalypse. Only one man stands in their way, but he's running out of bullets.

As their small Midwestern town prepares for its annual Christmas Eve parade, Sheriff and his deputy discover that a maniac in a Santa suit is murdering those he judges as naughty.

Doug Glatt, a slacker who discovers he has a talent for brawling, is approached by a minor league hockey coach and invited to join the team as the "muscle." Despite the fact that Glatt can't skate, his best friend, Pat, convinces him to give it a shot, and Glatt becomes a hero to the team and their fans, until the league's reigning goon becomes threatened by Glatt's success and decides to even the score.