Klaudia Wehmeyer, the proud co-owner of a pastry shop, has to stand trial because her manager Müller and her fraudulent partner Lehmann accuse her of embezzling half a million euros. After she is wrongly sentenced to prison, the spirited woman flees the courtroom in a hurry. Disguised in a Santa Claus costume, she plans to break into Lehmann's villa to gather evidence of her innocence on her own. When the plan fails, she finds shelter with two neighboring children who believe they are looking at the real Santa Claus. However, their single father is anything but happy about the strange guest. Only when he gets to know Klaudia better does he realize that there is more to the Santa Claus costume than a simple burglar.