The newly minted family moves into a new home. It happened just a couple of days after the two girls, Rita (12) and Kira (10), were told that their parents would soon get married. So now they will become step-sisters and live together – they will be one big family. Rita is happy finally to get the good father she always dreamed of. Kira does not like the idea of the new family at all. New rules and new conflicts arise in the new family life. Someone has to give in, but neither girl is willing to give up. Parents decide to make a new, common child. This threat unites girls.