Niles Talbot moved from the country to the big city to get a job as an electrian but ended up as an executioner. His trouble begins when he's suddenly uemployed and decides to take the law into his own hands. On Christmas Eve, a woman slaughters her husband and learns that she's on Santa's naughty list when an escaped maniac dressed as Santa Claus shows up at her doorstep with a special present for her. A bum named Ulric is given the chance of a lifetime when a scientist puts the gland of a cat inside his body. Soon Ulric becomes the main attraction at a sideshow.