Two families, Sebkovi and Krausovi, are celebrating Christmas, but not everyone is in a good mood. The teenage kids think that their fathers are totally stupid, and the fathers are sure that their children are nothing more than rebels, hating anything they say.

Whizzy is a little mouse, Whitebelly is a fox. They are naturally mortal enemies. One day, after an unfortunate accident, both meet in animal heaven. Together, they will embark on a fantastic journey and discover friendship can overcome everything.