When Didi is bedridden after a difficult delivery of her first child, she is overjoyed with the help of the maternity nurse. The baby is sweet and healthy, but Didi's recovery is slow. Miriam, who works for the Rotterdam police, cannot come to terms with the sudden death of her brother. She suspects malicious intent on the part of his beautiful widow Hennequin. During her search for Hennequin's past, Miriam becomes convinced that she is dealing with a life-threatening psychopath. And it is precisely this woman who has made herself indispensable in the young, vulnerable family... The maternity assistant describes ten decisive days in the lives of three young women. Vulnerability, willpower and lust for murder come together in an oppressive, moving page-turner: Esther Verhoef's scariest thriller ever.