The patients of fertility doctor Dr Jan Karbaat discuss how a desire to have children led them to close their eyes to an often horrific and unbearable insemination treatment.

The news gets out, leaving the Karbaat children to grapple with their genetic and emotional heritage, debating the impact of nature and nurture. The children share conflicting emotions of recognition and belonging, set against the fear of inheriting malicious genetic traits.

Dr Jan Karbaat had a favourite sperm donor, who yearned for immortality and produced over 200 donor children. Karbaat was highly unselective with his donors and unconcerned about genetic diseases. More and more cases come to light globally of doctors being sued for malpractice after inseminating patients with their own semen.