Kofi and Piet's group home has a new roommate, Milo Kaya. The sixteen-year-old is trying to escape from his criminal family clan with Arne's help. But he is suddenly suspected of stealing valuable professional tools: the stolen goods, including his fingerprints, are found in his trunk. Milo is so disappointed in him that he leaves the group home in a hurry. The Pfefferkörners, on the other hand, firmly believe in Arne's innocence and investigate on their own, visiting old friends and eventually visiting a children's play paradise.