This will be in an alternate universe that will go way back in time. It will be like The Middle Ages but for animals. The city is still called Zootopia but instead of having a mayor they have an archduke.
Judy Hopps is the archdukes only daughter and only child. She is just about to be presented to the court because she has come of age. Her father is getting older and soon it will be her turn to take over. For that to happen her father wants her to get wed first. Judy doesn't want to get married and she doesn't want to become the duchess. But she doesn't know what to do.
When a handsome young fox comes to the party her father has thrown for her everything changes.
Nick Wilde is an outlaw, a criminal. He steels and the entire city knows his name. Even though he is young he has managed to do a lot of damage to the upper classes of the city. But what the city doesn't know is that he helps the poor and homeless too.
Nicks and his gangs next target is to interrupt the biggest party of the year, the celebration the archduke has prepared for his daughter coming of age. Nick has planned to cut the celebration short and steel everything valuable to give away to the ones who really need it.
But when he meets the archdukes daughter nothing seems to go as planned.