All Merculian is excited about the visiting Colony Dancers. The children's group is so cute in their old-fashioned outfits and few stop to question how they acquired their brilliant technique so young, or why they are all so carefully guarded. Eulio manages to get one of the children alone long enough to make some shocking discoveries. Then Rio, the principal Colony dancer, claims to be a sibling of superstar Triani and reveals that he desperately wants to get away from the troupe, thus forcing the irritable celebrity into his escape scheme. Meanwhile, Investigator Marlo is tantalized by the strong resemblance of one of the young dancers to a child who was kidnapped long ago.

Is Rio right to be terrified? How far will the guardians go to keep the secrets of the Colony Dancers?