Léonce is the King of Bears who dearly loves his son Tonio. Sadly, hunters come to the mountains of Sicily and kidnap the poor baby bear. As a revenge to this action of men, King Léonce gathers his clan and together they embark on a mission to save the royal son and invade the land of human beings. However, this winter in the Sicilian mountains is the most severe from years which makes the intention of our furry friends extremely hard. Finally, with the help of the wizard of bears and the strong army (of bears) they reach their desired destination. King Léonce finds his son and the happy family tries to live in a city, like people do. But is such life suitable for bears?