Early in the morning the police were called to a house located in one of the safe neighborhoods. He entered the house and found a bloody young woman on the floor. She was still alive and taken to hospital. Where it had emergency assistance. The woman's name is Martha Wilson and she miraculously survived. Private detective Carl began an investigation at her request. The poor thing suspects that she was attacked by the order of her husband Charles and his mistress. But she cannot prove it so far and is afraid that they can try again. The detective goes to the client's house and wants to inspect the crime scene in search of evidence.