Worried that their children have become obsessed with television shows from Earth which extol the virtues of Santa Claus, Martians begin an expedition to Earth to kidnap the one and only Santa Claus. While on Earth, they kidnap two lively children that lead the group of Martians to the North Pole and Santa Claus. The Martians then take Santa Claus and the two children back to Mars with them. Voldar, a particularly grumpy Martian, attempts to do away with the children and Santa Claus before they get to Mars, but their leader Lord Kimar stops him. When they arrive on Mars, Santa Claus, with the help of the two Earth children and a rather simple-minded Martian lackey, overcomes the Martians by bringing fun, happiness and Christmas cheer to the children of Mars.