Helén and Jenö are waiting for a child and are desperately searching for an accomodation. They eventually sign a contract with an old lady, Szeréna, who lives in a two-family house. According to the contract, they are to pay a moderate rent and they have to take care of her until her death. After the first weeks, Szeréna accuses the couple of trying to poison her and builds a chicken coop on the balcony with the aim of living off the eggs she herself gathers.