The little Ines Kunz disappears from an amusement park. Three days later she is found dead on the Danube bank. Several girls do disappear from the same park and again are found few days later, this time incapacitated, abused and shocked.

After an emergency (late) brake, a train conductor thinks he has killed someone on the rails, forensic scientist Dr. Graf, however, does not believe in suicide, and thinks that the man was killed an hour before being put on the rails.

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.

In a beauty salon in the center of Vienna, a customer suffocates during a facial treatment. The coroner finds that the client was murdered.

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.

In the middle of winter, little Sabine is found dead in an outdoor pool. It quickly becomes clear that this is murder. Moser sets the culprit a trap.

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 into 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.

When the owner of two grocery stores is shot, Moser determines undercover as a laborer on the vegetable market.

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.