In the life of Platon Omolov, a rich man, a sybarite, a bachelor, a dark period began. Under unclear circumstances, his brother, a common fund holder named Bogomol, died. He left behind heirs - sons Venya and Fedor. And so these two nieces settle in Plato’s apartment. The eldest, Fyodor, should take over the father’s “business” after he turns twenty-one. But you still have to live until your birthday. Plato unexpectedly became attached to the shady brothers, despite the fact that they got him involved in criminal disputes. But here miracles begin! A girl-witch appears in his life, a sort of Frog Princess. She settles in Plato's house as Fyodor's wife. But even this soothsayer does not save Fedya. He dies. Now his youngest son, Venya, must inherit Bogomol’s millions. Will he live to see this time? Plato is not sure...