After being separated from his parents on the way to America, the young Russian mouse Fievel runs into many adventures as he tries to reunite with his family.
Plagued by recurrent attacks from cats, a family of mice decides to migrate to the West in search of a so-called haven where mice and cat co-exist in harmony. Only the news about that haven comes from a cat that has a secret agenda.
As Fievel and his friends pursue a treasure map, they find more than they bargained for in the form of Native American mice who have a whole city beneath New York.
After Fevil and his sister Tanya seek to find a job, they actually succeed in working in a local newspaper, where Nelly also works, and hopes to become a famous journalist. After fulfilling her dream and reporting on the sudden disappearance of mice in the city, she makes up a fictional story about...Read more a monster living in Manhattan, and that he is behind the reason for the disappearance of mice.