Jan Müller

Famed outlaw Lotrando sends his son to a strict Catholic boarding school to learn manners, but the boy becomes too polite to lead the band. When they inadvertently arrive in a sultanate where the princess Zubeida lies gravely ill and are mistaken for physicians, father and son must overcome their inexperience and imposture to heal her and save the realm.

Young Petr (Adam Novak) and his four friends undergoes several adventures throughout this series--setting a field on fire, sneaking into a theater without paying and many more.