When Tom was going to the office people staying at the Isar river told him that they saw a corpse floating in the river.The team arrives, in her clothes they find her identity card an a cell phone, Pia Heise, she shows hits in the face and was suffering a chronicle disease.The mother called the police at night because Pia went to visit Benjamin Stein and didn't return at home.Tom and Richard go to the apartment of the family.Hanna, Pia's mother receive them and explain that Pia suffered the chronicle disease but could ride a bicycle and that Pia left her cell phone at home.The little brother of Pia tells Richard that Pia had a secret.Hanna receives the visit of her neighbor, Elisabeth Lechner who was also the professor of Pia.Beside Hanna Heise says that she is divorced and that she doesn't have any contact with Frank, her ex-husband.
—zutterjp48