The kids go to the flea market where Charly thinks that people sell stolen clothes. Once there they meet Mr. Brassert, a dog trainer in a canine training school, and sign Dandy up for a weekend course and teach him protection maneuvers. Charly's older sister Nicole, who's becoming good friends with Stefy, will join the detective agency ¿ to Charly's disgust! But when Nicole is kidnapped by a gangsters' group, Charly & Co. join forces with Miki, Nicole's boyfriend, to save her.
