Ben and Semir are walking in unknown territory: traffic education at primary school. And as if the third graders weren't difficult enough to tame, they come across a suspicious trail at school that leads them to a gang of serious criminals. The alarm bells ring at Semir and Ben: Are the crooks planning a devastating attack? What are you doing at primary school? And what role does the quick-witted teacher Silke play, in which Ben has found more pleasure than he admits? Events overturn when suddenly the school bus is kidnapped with the entire class. Ben tries in vain to prevent the kidnapping and instead falls into the hands of the criminals. Now Semir is on his own in the investigation, but when he realizes the whole dimension of the crime, he knows that an unexpected catastrophe must be prevented. He is helped by an old acquaintance: conspiracy theorist Sturmi ...

With the help of Semir, the young hothead Cem finally got his life under control. He has just finished his apprenticeship and is newly in love with the pretty Shirin, who works as a singer for the rap producer Omid. But this is exactly what the officials are now investigating because he is suspected of trafficking drugs. When the wanted person is murdered, Semir and Ben surprisingly come across Cem, who wants to flee the scene and is innocently suspected of murder. Cem ends up in custody. Ben and Semir track down the real perpetrator, but they cannot prevent an attack on Cem. Cem barely survives. To protect his friend, Semir goes to extremes. He frees Cem from jail. When Ben and Semir find out that corrupt police officers are involved in the crimes, they are in mortal danger themselves. At the same time, Cem is vulnerable to his hunters ...

Ben and Semir have an unusual visit from an auditor of the Court of Auditors: Ludwig Tietze. The savings commissioner has found that the two are by far the most expensive police officers in the country. Now Mr. Tietze wants to look at the two of them at work and makes them a tough savings program. Now that the team has launched an investigation into a brutal gang that specializes in shopping center raids. But Ben and Semir are on their own due to the savings course, almost at least, because even when the two are lying in wait, Ludwig Tietze is there. But just as the police officers and their stubborn inspector get closer, the criminals strike again and Ludwig Tietze makes a terrible discovery ...

The persecution of a bank robber trio ends in disaster for Ben and Semir, because they unintentionally get into the festive inauguration of a new section of the highway while chasing and thus incur the resentment of the interior minister. The duo is now to be given a sentence. They see only one chance to avert the impending transfer: they have to prove their success with the motorway police within the few remaining hours. They soon learn that the dangerous trio originally acted as a quartet and, of all things, completed Semir's great cousin Aladdin. However, Aladdin has been arrested and is in custody. He is ready to help Ben and Semir with the investigation - but on one condition: Ben and Semir have to get him out of jail for a day and accompany him to his sister's wedding. Together, the unequal trio goes on a gangster hunt, in which, of course, nothing goes as the two policemen would like: Aladdin turns out to be a hard-to-control nerve saw, who also pursues his very own plans ...

In the police training institute, Ben and Semir take over the driver training and are put through a real test of patience by the two young police students Turbo and Speedometer. The two likeable chaots still lack seriousness. But the youthful light-heartedness is brutally over when her boyfriend and classmate Felix is murdered. Turbo and Speedometer decide to find the killer on their own. Accordingly, the two of the investigating autobahn cops radically intervene in their investigations. One of the trainers soon becomes suspicious. Did the teacher really murder his student? But with what motive? Then Semir and Ben discover a connection to a drug lord, the mysterious snowman ...

It's about 'The Future of the Automobile'. Minister of State Rodenbach presented the initially skeptical motorway police officer with an electric car. But the ceremony is disrupted by a murderous attack on the responsible research institute. It quickly becomes clear: it's about industrial espionage. The head of institute Brandt's invention - a revolutionary, highly efficient battery - is the object of desire. In the eyes of Ben and Semir, the hostess Claudia is suspicious, after all, she turns out to be a doctoral student who was recently kicked out by Brandt for attempting espionage - her own father! But in the course of further investigations, the motorway police officers track down gangsters who are not afraid of further murders.

It’s Christmas Eve. Ben and Semir are on duty. They notice a man racing across the highway and building several accidents. He also touches a prisoner transporter, which now breaks down with engine damage. Ben and Semir have to take the prisoners with them to their area. While the two improvise a small Christmas party with the JVA officials, masked figures approach from outside and break in through the basement of the district and get to grips with the detention cell. When they are discovered, the burglars open fire on the police without warning. During the exchange of fire, one of the JVA officials is shot by the attackers, who then flee undetected ...