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.
Ilyes Raoul
as Tim
Lorenzo Germeno
as Willi Sauerlich
Emma-Louise Schimpf
as Gaby
Manuel Santos Gelke
as Karl
Mai Duong Kieu
as Amanda
Phil Laude
as Bienert
Antoine Monot Jr.
as Hermann Sauerlich
Trish Osmond
as Erschreckte Oma
Milan Peschel
as Raimundo
Trystan Pütter
as Kommissar Glockner
Tom Schilling
as Lehrer Pauling
Samuel Schneider
as Georg
