TKKG
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.
Starring Ilyes Raoul, Manuel Santos Gelke, Emma-Louise Schimpf, Mai Duong Kieu, Phil Laude, Antoine Monot Jr., Trish Osmond, Milan Peschel, Trystan Pütter, Tom Schilling
It's a crime and action & adventure movie, and has a rating of 5.8 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Denmark.