On the way to a big family celebration, where Klösschen is allowed to bring his friends Tim, Karl, and Gaby, the Sauerlich-Jaguar gets stuck in a terrible snowstorm. A run-down inn becomes their salvation. There, Klösschen's Uncle Kurt, Aunt Linda, and their cousin Hedwig Müntefering with her husband also find themselves stranded. The connection to the outside world is cut off, the phone line is dead, and the innkeeper seems anything but trustworthy. After a turbulent evening filled with family disputes, the domineering Hedwig Müntefering discovers the next morning that the extremely valuable family seal ring has been stolen from her jewelry box. It turns out that everyone present has a motive for the theft. The culprit is therefore among them. TKKG begins their investigation, unaware of the danger they are putting themselves in. Episodes: 1. The young man with a full beard and hood 2. The troublemaker 3. The jogger with sunglasses 4. The made-up woman 5. The hunched butler 6. The policeman 7. The policewoman 8. The blind woman 9. The medium with a veil 10. The cleaning staff with a mouth-nose mask 11. The assistant with horn-rimmed glasses 12. The old man with a full beard and hat.