After the death of her brother Bommel, 16-year-old Pia is transformed. She reacts with defiance and rebellion. Since there is also a crisis in the marriage of her parents Charlotte and Frederic, she only has her boyfriend Noah and her old nanny Rosa as reference persons. Her parents register her at the renowned boarding school in Martinsrode without her consent. At first Pia feels pushed aside, but little by little she makes new friends.