Commissioners Neuhaus and Gillot are supposed to investigate two deaths. A man suddenly dies at home and a young man dies from his crossbow. Foreign influence? This death is very close to the detectives' minds.

On the run with a hammer: Inspector Jung and her boss Enders pursue a perpetrator in Mainz's old town. Back at the station things get difficult: a rioting prisoner screams like he's out of his mind.

Funny costumes and lots of alcohol. The Old Town Guard has a lot to do during Carnival in Mainz. Does the llama go for walks with his own garbage can or is it stolen? Police Commissioner Jung investigates the matter.

Inspectors Udo Hotz and Omar Meftah from the Heidesheim motorway station have just confiscated a driver's license when they are called to an exciting chase.

Brawl in front of a club: Commissioner Katharina Klüpfel and Michael Kirch are called to a club. They resolve the argument among several drunk and aggressive men, but suddenly the mood changes...

A lot to do that night: The search for a stalker is underway, a young drug victim is being examined and a confused man is crouching aimlessly under a lamppost while a car rushes into the tram tracks.

A turbulent night in Mainz: Alcohol and riots determine the police operations. In front of a nightclub, the old town guard has to mediate between bouncers and a very drunk guest. And the KDD is called to a body found at a bus stop.

Nighttime search operation for the Mainz Old Town Guard: Will they find the boy in time who announced his suicide after an argument? Meanwhile, the criminal investigation service makes a grisly discovery: a badly decomposed corpse in a house completely littered with rubbish.

An alarming radio message reaches the Old Town Guard team. Shots are said to have been fired in a Mainz residential area in the middle of the night. To protect themselves, the officers have a dog with them, which could more easily overpower an armed perpetrator.

The highway police have to secure an accident scene in the middle of the night. A deer lies run over on the road. The situation is risky, also because a car is racing towards the officers without braking. The old town guard is also called to a dangerous mission: a robbery with several people injured.

The KDD is called to a break-in in downtown Mainz. The victim is missing a weapon. He knows the alleged perpetrator and suspects that he is planning further attacks. Meanwhile, in the city center, a motorcycle gang is making the streets unsafe, and the Old Town Guard is in pursuit.

A restless night for the KDD: First the investigative team is called to an armed robbery at a gas station, then a break-in at a scrapyard is reported. They find a suspicious car near the crime scene and discover several bolt cutters in the trunk.

A series of arsons shakes downtown Mainz. Two radio messages come in one after the other that night: Garbage cans are burning in residential areas. The flames threaten to spread to the houses. The police have to be on site quickly. The two police commissioners Sarah Schräder and Jonas Horder try to get the fire under control before the fire department arrives. Meanwhile, another garbage can is burning in the neighborhood. The Mainz Fire Devil has been causing mischief for months. When the fire was extinguished, the team from the Mainz 1 Police Department began looking for the perpetrator. Several identity checks are scheduled that night. Meanwhile, the Neustadtwache Mainz team receives a tragic radio message: a man is lying lifeless in a pool of blood. Next to him is a gun. Here, too, the police officers have to be on site quickly and clarify: Is this a crime, a murder or is this a suicide that the patrol officers find?

Quick intervention is required when this radio message comes in: choking attack on an Uber driver. When the police team Sarah Schräder and Jonas Horder arrive at the scene in downtown Mainz, a man has another man under his control. The situation is completely opaque. The team has to react immediately: It turns out that the man lying on the ground is heavily drunk and very aggressive. He's the one who attacked the Uber driver. His friend holds him. The Uber driver complains of severe pain in his neck. Why the choking attack occurred remains unclear. During the night another radio message comes in: A girl is looking for her friend. Both were attacked and beaten by men on the banks of the Rhine. The girls fled in different directions. Now the worry is great: Where is the girlfriend?

A drunk man riots at a gas station in Mainz. The employee calls the police. When the police officers arrived on site with flashing lights, the man continued to behave aggressively and unreasonably. A scuffle ensued until the police handcuffed the man and calmed him down. Meanwhile, the two police commissioners Sarah Schräder and Jonas Horder are still looking for the missing girl on the banks of the Rhine. After an extensive search in the dark, they finally find the distraught girl. She was beaten and needs to be checked in hospital for injuries. There is trouble in front of a club in downtown Mainz. The bouncer called the police because a group of young men were rowdying and behaving aggressively. The patrol team Lena Bottländer and Gerwin Schwiersch have to call for reinforcements; they cannot handle the situation alone.

The 11.11. in Mainz, carnival, state of emergency in the carnival stronghold! Both teams from the Mainz 1 police station are on duty that night. Lena Bottlender and her colleague Gerwin Schwiersch, Sarah Schräder with Jonas Horder. The 11.11. It's a very special night for the four of them, there are a lot of people out and about and many of them are heavily drunk. Crimes, crimes and misdemeanors are increasing. The two patrol teams rush from operation to operation in their police cars with flashing lights. Sarah Schräder and Jonas Horder find themselves in the middle of an argument between a group of young people and an older man. The fact that the latter of all people resists and becomes verbally abusive almost upsets even the otherwise calm duo - and puts the man in police custody. Both teams are called to a burglary - a rather unusual operation on Carnival. At the crime scene, the situation puzzles them.

Winter: The dark season is also the time of burglaries. The team from the permanent criminal service is called to a residential building in Mainz. Burglars stole thousands of euros there and took heirlooms. A traumatic experience for those injured. Not only valuables were stolen by the thieves; The fact that strangers were able to gain access to their own house and ransack everything in the bedroom also leaves those affected traumatized. Do the secured traces lead investigators Melina Reisel and Kevin Gugenheimer from the Criminal Investigation Service (KDD) to the perpetrators? The team Sarah Schräder and Jonas Horder are called to an accident in the city center. The car was pretty much wrecked and the driver got away with a black eye. However, the novice driver was drunk. He must therefore hand over his driving license during the probationary period.

On New Year's Eve the radio message comes in: a break-in at a school. The police arrived quickly on site, but the area was completely unclear in the darkness. When the police officers discover the burglars, a short chase ensues. It turns out that they are teenagers who wanted to have a little adventure. That same night, a car races through a 30 zone, with the two police officers Sebastian Obermeier and Dominik Muders following behind with flashing lights. You provide the driver. As they approach the vehicle, they notice a suspicious smell: marijuana. Examination of the occupants and the vehicle shows that these are not the only drugs they have with them. Meanwhile, the team of Michael Kirch and Paul Wiens is called upon to respond to an accident. The question of guilt is unclear and the statements contradict each other. The police team helps solve the car accident.

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