One minute Femi is playing with Pepper in the park, and the next, the dog has seemingly disappeared without a trace. Tayo, Levin, Nele and Kira are on the scene immediately to help Femi and search for Pepper. When the Pepperians learn that a gang of professional dog thieves is on the loose in Hamburg, they fear the worst, but their suspicions turn out to be a false lead. They eventually find out that a little girl must have seen the dog and taken it with her. But when the little girl is brought in for identification, Pepper has once again disappeared and the little girl is distraught. Their trail leads to a disused factory where attack dogs are trained.