The Triplets of Belleville.The film begins with a flashback showing The Triplets of Belleville: a trio of singers performing on stage in the early 1900s (dancing alongside other celebrities including Josephine Baker and Django Reinhardt). The story focuses on Madame Souza, an elderly woman raising her young grandson, Champion. Souza notices her grandson is sad and lonely, hinted as due to the loss of his parents, so she first tries to get him interested in the piano. When this fails, she buys him a puppy named Bruno to cheer him up. Although he is initially happy, he quickly becomes melancholic once again. After discovering that Champion has a keen interest in road bicycle racing, because it is implied that Champion's deceased parents were cyclists, she buys him a tricycle. Years later, Champion becomes a professional cyclist with Souza as his coach. Eventually, Champion enters the Tour de France but during the race, he and two other riders are kidnapped by two French mafia henchmen and brought to the bustling metropolis of Belleville. Souza and Bruno follow the men, but lose their trail soon after reaching the city. Lost and with no way to find Champion, Souza has a chance encounter with the renowned Belleville triplets, music hall singers from the 1930s, now elderly women turned improvisational musicians. The sisters take Souza to their home and over time she becomes a part of their group. Meanwhile, the mafia boss drugs the kidnapped cyclists and employs a mechanic to build a stationary cycling machine for the racers to race on — to create their own mini Tour de France for gambling...