The Klettmann family lives in a chic Munich suburb, there are no financial problems: Peter Klettmann is a successful lawyer, his wife Anna takes care of their children Vivi, Daniel and Emmi. Life seems perfect, but on Anna's 44th birthday, a world collapses for the family: in a fit of anger, Peter kills his wife and is taken into custody. While his motif is a mystery and only takes shape when he immerses himself in his past, the children's carefree lives are over from one day to the next. 18-year-old Vivi begins fighting for custody of her siblings. She is supported by police officer Tim, who was the first to arrive at the crime scene. He seems to feel responsible for the children and manages to gain Vivi's trust. However, the young woman does not know that Tim already knew her mother Anna before the murder