In the Christmas season, a wave of burglaries puts Santa Claus at the top of Miyuki and Natsumi's priority list as they try to hunt down the thief and hopefully restore a little girl's faith in Santa Claus. To complicate things, the vigilante hero Strike-Man decides to spread some Christmas cheer of his own as the one and only Santa-Man. Will the duo be able to solve the crime before Christmas arrives and Santa disappears for another year?

Natsumi's bike breaks down and she runs into a mechanic who makes her fix it herself.

Maho's kitten disappears and Nakajima, Miyuki and Natsumi try and help find her kitten, as does Strike Man!