Max Shadurin and his sisters Asya and Masha were amazed when they arrived to visit their grandfather in the seaside village of Abrikosovka. Instead of the hut on chicken legs that he built after selling his city apartment, they saw a luxurious mansion. Where did that kind of money come from?.. It turns out that the grandfather called them to solemnly present a bronze bowl found on the shore - supposedly it saved his life and gave him wealth. And now Shadurin Sr. wants the cup to bring good luck to his beloved grandchildren: tennis player Max, who has been fatally unlucky lately, Asya, who is bogged down with housework and raising her infant son, Masha, who dreams of getting a grant to study in the USA... Grandfather was always known as an eccentric, and no one took his gift seriously. But Max was the first to turn to the bowl with a request... and won the tournament. Is there really a mystical power in the trinket?