A group of families discover that the charming man they trusted is also the sperm donor for hundreds – or perhaps thousands – of other children around the world. The Hague sperm donor Jonathan Meijer was taken to court in 2023 by the Donorkind Foundation and a mother of one of his children. They stated that the donor has fathered at least 550 donor children 'and does not want to stop'. The miniseries zooms in on some stories of couples who came into contact with Meijer as prospective parents. They went into business with him - without knowing how many other children the donor had already fathered with his sperm. Their children may now face health risks later in life.