Even though she outperforms the competition, Genevieve is disqualified from a dog show because she is not a purebred. But after she rescues the Mayor's dog, the judges change their tune.

The girls are looking forward to a big costume bash at Pepito's house, but a week or so before the festivities they all come down with chicken pox and are quarantined in the Old House.

The girls and Pepito visit Pepito's relatives' hacienda in Spain and encounter Pepito's cousins, who are naughty and mischievous.