A superhero in the million-city: When the supermarket is robbed, he rushes in wearing a red mask and cape, confronts the criminals, and returns the loot. TKKG finds the whole situation suspicious. After their first encounter with the Red Rescuer, their detective instincts are awakened. Who is behind the mask? TKKG consists of Tim, Karl, Klösschen, and Gaby. The four friends bravely solve every case and dive into exciting adventures. Of course, their dog Oskar is not to be missed.