Eleven-year-old countryboy Dusan inherits a donkey from his grandfather. Dusan´s mother, a nurse who is particular about things such as cleanliness, order and a trim garden doesn´t want the donkey in her household. Her decision is firm: “The donkey has to go!” Fortunately, Dusan meets Johanna, a girl from Prague. Johanna is full of ideas. Both children spend a lot of time together and go through many adventures to find a good home for the old donkey. Their ideas are zany sometimes, in particular the one of painting the donkey white in order to make him look more attractive for a fair. In the end they manage to get the donkey to Dusan´s father who doesn´t live with his family. He travels with a circus and takes the old donkey. Finally the animal is safe and also Dusan´s complicated relationship with his father is resolved.