Marie Brand

Renowned anesthetist Raimund Weirath is found lifeless in the hospital's smoking area. The body shows signs of a fight, but there are no witnesses. The dead man's potential successor is Florian Groth. He is a former lover of Marie Brand. From him, the commissioners receive information that the murdered man was recently entrusted with a delicate task.

Jessica, the daughter of former professional boxer Joe Kramer, is in a coma after an accident under general anesthesia and is declared brain dead. The task of the dead Weirath was to inform the parents about the hopeless condition of the child and to ask for approval for an organ donation. At the young girl's bedside, Marie and Simmel meet the mother Sybille Krämer and find out that she is not informed about her daughter's brain death. When asked about her ex-husband, she explains that Joe is in open custody and is on his way back to his cell. But he never arrives there and thus becomes the focus of the investigation. Then Marie finds out that there was also a dispute between Florian Groth and his superior about the Jessica case. When a witness reports

The decisive lead is then provided by the autopsy of the dead man. There are dried paint residues in his trachea. Was the man in the white coat perhaps not a doctor, but the master painter Stefan Fassbender, who was at the clinic with his daughter? Marie and Simmel learn that he too has lost a child. After talking to Weirath, they approved their daughter's body for organ donation. The loss of the child deeply traumatized the whole family. But is the master painter also the murderer?

The corpse of the building rubble disposal company Lutz Köhm - wrapped in black plastic foil - is fished out of the garbage on the premises of Kai Milas' dilapidated disposal company.
The inspectors learn from the dead man's girlfriend, Jasmin Schulte, that the business relationship between Lutz Köhm and Kai Milas had recently been very strained. Jasmine is also the focus of the investigators.
There were heated arguments between her and her boyfriend Lutz when she found out about his affair. While researching the work environment of the murder victim, Marie Brand and Jürgen Simmel find out that until a year ago he was still employed at the large recycling center in Schottbusch. When he caused an accident there that put a man in a coma, he was released. The generous compensation he received from his boss Patrick Schottbus makes the inspectors suspicious. What does it matter that the victim of the accident was an environmentalist looking for illegal activities at the big business's recycling yard?
The accident victim's activist group has published clear evidence that Schottbusch illegally dumps its recycling waste abroad. Active in the group are Leslie Hollmann, the dead man's sister and his girlfriend Juna Becker. When the commissioners find out that the injured environmentalist died in hospital shortly before Lutz Köhm was murdered, they suspect the key to the investigation is the connection between the two deaths.
Marie is also confronted with a burst water pipe in her apartment. Her landlord and boss Engler tries to regulate the situation, but this causes even more chaos because Marie's furniture is accidentally disposed of as bulky waste. In order to cover up the mishap, the inspector is summarily quartered with her colleague Simmel, who, however, has just moved in with his new girlfriend Annika, who thinks Marie is more than his colleague.

The engineer Claudio Messina dies on a construction site. Marie Brand quickly finds evidence pointing to a murder that was supposed to be disguised as an accident. The behavior of the foreman Giuseppe Costa at the scene of the crime raises the suspicion that the company employs undeclared workers. When the police file of the murdered man is still secret, the case becomes mysterious. Was the victim in the witness protection program? A member of the mafia? Marie Brand and Jürgen Simmel discover that Claudio Messina was hot on the heels of senior contractor Schimkat, who was cooperating with a front company in Italy to procure undeclared workers.
When the inspectors look for the company founders, it turns out that they are two Sicilian goatherds who are staying in a men's hostel in Cologne while the dubious contracts are being signed. The mastermind behind this business relationship is the young Italian Carla. While the inspectors are on their trail, another person dies: the foreman Giuseppe Costa is found shot dead. Next to his corpse is the identification mark of a mafia family known to the police.

After a wild party night for her 18th. Isabell Lauterbach's birthday finds her ex-boyfriend Ben Thiele dead. All memories of the night have been erased. Did she kill him? In addition to cocaine, raw nol, the so-called rape drug, is also found in Isabell's blood. Does the memory loss come from the K.-o. drops, or does it not want to burden itself? Marie Brand and Jürgen Simmel interview the party guests, including the sprint relay, in which both Isabell and Ben train have. Investigators focus on Isabell's best friend Ella Wittmer. Not only does it keep investigators from providing important information to protect themselves. Everyone involved seems to have a secret and a motive. Marie Brand and Jürgen Simmel try to reconstruct the crime night. When they get the crucial clue to the perpetrator, a race begins over time, since the murderer already has his next victim in his catch.