A young girl embarks on a series of misadventures, causing her friends and teachers to be worrisome. Based on the children's books by Ludwig Bemelmans.
When Madeline and the girls find some collectibles from the 1800's in the attic of the Old House, they decide to set up a booth at The Flea Market and unwittingly sell Pepito's father's Ambassador ring (which Madeline tracks down using her detective skills).