Yuri Ilyin

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A large family gather to celebrate a birthday. It would seem like a great reason to get together. But the family is just a project of one of the "brothers" — an experienced psychologist who is conducting an experiment to create a "happiness formula". He believes that manipulating others, their emotions and desires, will make them happy. However, love interferes with the mathematical calculations, which can neither be calculated nor predicted.

At the beginning of the German occupation, the boy and his older teenage sister are left without adults with a museum collection of coins and orders in their hands. Germans and policemen are looking for treasure, chasing children literally on their heels. In order to find the missing mother and save the treasure, the sister and brother need to find protection and help from the partisans.