Ms. Janis’ house is under renovation and she asks Charly & Co. whether her dog Nino can stay with Dandy for a few days. That same day, a graffiti appears in the school façade. In the meantime, the municipal police are looking for the so-called ‘thief of the white stocking’ who holds up bank vans. While Charly & Co investigate the graffiti, detective Dandy and his assistant Nino discover the link between the graffiti and the thief!