An elderly woman calls the Berlin police claiming she had observed a murder while she was looking out her backyard window - in all parallels to Hitchcock's film classic “Rear Window“ - that had been aired just the night before on TV. The investigators are in doubt: Was ist just imagination? Or ist there more evidence? As the alleged murderer claims that his wife - the victim in question - was on a trip to Lisbon by train, all the detectives can do is wait and gather additional information.So the investigators sit with the woman and observe the suspect. Two days later they finally reach the suspect's wife by phone in Portugal. The hotel clerk confirms her identity. The next morning, police find that the elderly witness has disappeared. Not before long, the Portuguese police inform their German colleagues that they have found body parts of a woman, likely to be identical with the German woman.