After the elimination of Commissioner Brandtner and Böck, there is a vacuum in the office. Rex feels abandoned. Meanwhile the sportswoman Niki Herzog teaches some pickpockets to be afraid, while Marc Hoffmann has to prove to the staff and customers of a supermarket that he is a policeman and that his revolver is a weapon of function...

A burglary goes wrong: Bernard Bauman is killed by a thief he caught at home. Bauman's sister, Sonia Fuchs, is his only heiress. Marc and Nicky suspect her of a frame-up...

Following a bet, professional climbers Hans and Pete climb the City Hall tower at night. Unfortunately, Hans presumes his strength and falls, in front of the eyes of his friends. In order to avoid problems, the body will be deposited in a construction pit. To top it off, the body will already be discovered the next day.

A young woman is strangled in her home. Rex investigates and collects the little dog she had just adopted. Suspicions are focused on a man with an alibi. The only proof of her guilt is on the muzzle of the dog, which had bitten her during the assault.

Commissioner Marc, together with his colleague Niki, investigates the case of the strange suicide of a young girl. He discovers that the girl visited a psychologist – but she was murdered. Could she have known something to do with the girl's suicide? The investigation gradually uncovers terrifying connections. And again, the bushy wolfdog Rex proves to be an invaluable helper ...

On the advice of an anxious neighbor, two police officers search the house of a violent man for different weapons that they will confiscate, Kostial not having a weapon. Although Kostial makes no opposition, he soon goes to his neighbor's house, kills him and one of the policemen in his office.

A puppeteer is murdered in the theater where he is performing. There is not the slightest clue that could help Marc, Nikki and Rex carry out their investigation, and that could allow them to discover who wanted to make this sensitive man disappear... Soon after, another murder occurs, and the circumstances surrounding this murder remain just as mysterious... On the other hand, the two victims had one thing in common: the same lawyer, Mr. Beck... Both had encountered problems after committing the same crimes. Michael Kaipl, Beck's assistant, was actively involved in these matters, and not just during his working hours.

Something incredible is happening in a top-secret location: fights that never end before one of the participants is killed. A woman tries to inform the police about this fact, but before the officers arrive, she dies. It seems that someone is making huge bundles of money from these morbid games. Marc and Niki follow the trail, but their lives are also in danger...

An individual disguised as a strangling postman Eva Fentz, a blonde, pretty and rich young woman. This is the real factor that discovers the victim's body. He explains to the police that he tried to resuscitate her, in vain.

Iris Konrad, a cunning employee, convinces two brothers to rob a jewelry store in her company. While one of the brothers waits in the car, the other two rob the trunk. Unnoticed, the jeweler activates a silent alarm connected to the police and tries to restrain the thugs, but the unfortunate man will be shot.

Simply on clues, Erwin Schuster is sentenced to a long prison term, for burglary and murder. He will not stop there. By classified ad, he met the discreet Elli Lischka and by false promises, he put it in his pocket. She is willing to do anything for him.

Mélanie Berger and Anita Scholtz, two actresses, go to a reception. The rivalry between the two stars is obvious. During the evening, during an altercation, Melanie is hit with a bottle by a young fan turned away and collapses dead.

Egon Limbach and Roman Forster, two art dealers, are offered ten million dollars by Spencer Davis, a collector, to steal an Egyptian mummy. Since the sarcophagus alone represents an interesting sale, the two men decide to make a copy. And to play the role of a second mummy, the two individuals decide to recruit via a classified ad the ideal pigeon, which they plan to kill and make up according to Egyptian ancestral rites.