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. Then, when Dr. Cohn declares that they have recovered just in time for the party, Madeline helps everyone create costumes that incorporate their remaining "spots".
Lord Cucuface becomes convinced that the girls have musical talent and schedules a Bastille Day performance. But really it is only their victrola - and Chloe - who have the talent, and when Chloe is hospitalized after a pillow fight accident, the girls lose hope. Finally Madeline (with the help...
The girls and Pepito visit Pepito's relatives' hacienda in Spain and encounter Pepito's cousins who are naughty and mischievous "bad hats", the way Pepito used to be (only worse!) The cousins terrorize everything in sight: various animals, the guests at their parents' fiesta, and even the girls....
The girls find a homesick parrot who repeats the same street names over and over. But when Madeline takes "Monsieur Parrot" to those streets, she has no success in locating his home. Finally she figures out that the streets in question all have Metro stops, and M. Parrot is returned to his owne...