Nina, the mother of five-year old Morrison Glas is about to give birth. She is a vet. The father, Steven, has a small garage, next to their house. Nina and Steven love Morrison very much, but they are too busy to spend time with Morrison, because of their busy lives. When Morrison discovers that the new baby will get his room, he is afraid that he will have to move to tante Zuster, an aunt of his father. Now Morrison is determined, he will not move to tante Zuster! When the baby unexpectedly is about to be born a week early, Morrison has to be taken to tante Zuser in the middle of the night. Morrison thinks up a plan and gets away. He goes into hiding and a giant search is organised by the police and the villagers. When he also 'kidnaps' his newly born sister 'Simone', Nina and Steven have no clue what to do. How will this adventure end for Morrison and his little sister?