It's Christmas! Danger Mouse (Alexander Armstrong) and Penfold (Kevin Eldon) are tasked with protecting Santa (Brian Blessed) from the villainous clutches of the festive season-destroying Snowman.
Embarrassingly inept villain the Snowman (Richard Ayoade) is fed-up with being humiliatingly defeated by Danger Mouse and decides to get revenge by kidnapping Father Christmas. This time, Danger Mouse and Penfold's attempts to thwart the Snowman end in disaster, with the villain superpowered by Christmas spirit and Santa's hat! In a whirlwind of bah and humbug, the Snowman sabotages the festive holiday. Danger Mouse must lead an army of elves and a rejuvenated Santa to battle the superpowered Snowman and melt his evil plans.