Widower Peter Schwarz tries to be a good dad for Sebastain `Basti`, but his work as museum curator in Dresden keeps taking priority. Even Basti`s 12th birthday, supposed to be crowned by a quality time trip, takes second seat when a treasure stolen during Word War II from Saxony`s king August the Strong`s fabulous collection is found. A museum employee in cahoots with art thieves steals the priceless dagger of Genghis Khan`s heir. Basti finds clues, but dad is still too busy, even flirting an employee, who also takes to Basti. So the boy snoops with his best friend Benni.