This comedy is based on a little boy called Nicolas that gets up to all sorts of mischief with his friends. Some are unintentional while others are intended. Matters get worse when Nicolas thinks his mother is pregnant and thanks to his friends thinks this means that his parents don't like him anymore. Before any drastic decisions are taken Nicolas understands what it really is like to be a big brother. But things don't turn out quite as planned. During this time he thinks he is going to get a younger brother but instead gets a sister.[