In the historic melting pot of 19th century New York City, Fievel and the Mousekewitz family are struggling to make their American dream come true. But when a mysterious treasure map leads Fievel and his friends to a secret world of Native American mice living beneath the city, he finds something even more precious than gold and jewels!In the historic melting pot of 19th century New York City, Fievel and the Mousekewitz family are struggling to make their American dream come true. But when a mysterious treasure map leads Fievel and his friends to a secret world of Native American mice living beneath the city, he finds something even more precious than gold and jewels!