The film is narrated from the perspective of young Nicolas who is content with his life, is loved by his family and has fun with his school friends. One day, his classmate Joachim discovers his mother is pregnant and he is soon to have a little brother. Joachim laments about the extra responsibilities and the possible neglect as the baby will receive all the attention. That night, Nicolas overhears his parents talking and suspects his Mum is having a baby, and they will abandon him in the woods like Tom Thumb. Nicolas enlists the help of his friends to get rid of the baby by hiring a gangster to kidnap it, resulting in hilarious misadventures and laughs along the way.