The little Ines is found dead on the Danube bank. At the same time, an amusement park disappears into girls, who are found again a few days later: abused and in shock to be incapacitated.
A German tourist photographs young men in downtown Vienna. One of them he invites in the evening in his hotel room. The next morning, the tourist is found dead - the photos are the only trace.
A man is shot dead in a hotel room, and the telephone operator Brigitte Heinrich is a witness to the murder. Sophisticated assassinations are committed on the blind witness.
Ernst Fuchs and Fritz Groh attack a money transfer. In the exchange of fire Fritz and a monetary transport driver are killed - Ernst flees with the money.
A young, pretty woman is strangled in the bathroom. The smell on the belt of the bathrobe Rex reacts sensitively. But apart from the perfume, the culprit has left no traces.
A wealthy businessman gets kidnapped while doing his daily driving. A man who witnessed the kidnapping is found dead,taking the secret with him,inside the grave. Inspector Moser and Rex have a mystery to solve again.
Dr. Hausner, professor of veterinary medicine, collapses dead on the street: heart attack. What at first looks like a natural death is murder. Dr. Hausner's wife and his lover Uschi Reichert were near the crime scene - both have no alibi.
A car crashes over a slope, the driver burns beyond recognition. A fire expert alarms Commissioner Moser and his team: There are inconsistencies in the accident.