When Willi's father is abducted and is only released for a valuable statue from his art collection, Tim is the only one who believes Willi that the police are on the wrong track. Together with the smart policeman's daughter Gaby and the highly intelligent outsider Karl, they start to investigate on their own. Against all odds the four discover a conspiracy. In the course of their first big detective adventure they grow together into a committed community, and so Tim, Klöschen, Karl and Gaby become the band TKKG.

TKKG

Martina is a successful neurosurgeon, happily married and mother of a pubescent daughter. She has everything under control - until she is raped by Mischa, the son of her best friend Jutta and her husband Torsten, while on a joint family vacation. When Martina's husband Andi tells her friends about it, Martina has to face not only her trauma, but also the reactions and opinions of others.