Back in the GDR, Hajo convicted sex offender Peter Jaspersen of abusing and killing a seven-year-old child. Hajo had promised his parents that Jaspersen would never be released again. But now he's free again.
The SOKO investigators are called to a horrific find at an idyllic lake. A young woman named Sonja Wagner is recovered as a drowned corpse. The investigators are looking for their mother, Ida Wagner.
Chantal, a prostitute, is murdered in front of a modern brothel. It quickly becomes clear that the perpetrator must have known the area well. Dagmar Schnee from the Leipzig vice department supports the team in the investigation.
Ironically, when Leni is at a parents' evening in the kindergarten, the chairwoman of the parents' initiative, Kerstin Grün, collapses and dies after a heated argument. Jan and his colleagues are immediately called to the crime scene.
Ramona Wagenknecht, a lieutenant in the Bundeswehr, is found dead one morning in downtown Leipzig. Her husband Adrian Wagenknecht is in despair and tells the investigators about the difficulties in reconciling family and work.
An allotment gardener is struck by a lump of ice - frozen liquid from a leaking airplane lavatory. It was actually an accident - until the SOKO laboratory discovered that there was also a lot of blood in the ice.
The severed head of Count Waltheim von Thurmstein is discovered early in the morning on a square in the middle of Leipzig. The 57-year-old had been beheaded with an antique sword in his private apartment the night before.
The sexton of a Catholic parish in Leipzig is killed in the church. Shortly before his death, the 65-year-old received a large sum of money. The staid housekeeper of the parish priest, Cornelia Wettli, has suddenly become wealthy.
The shop detective Benno Dreesen lies with a knife in his back in the parking lot of the cheap discounter "Heisspreis". Dreesen had only been hunting shoplifters there for a week. Tom Kowalski investigates undercover in the store.
Tom Kowalski can hardly believe his eyes: Klara, his friend and colleague who allegedly died two years ago during an undercover investigation, suddenly stands in front of him and tells him a horrible story.
A boy is kidnapped on the street. At least that's what one witness says. But did that really happen? Hajo Trautzschke and his team believe her. Unlike Dr. Binz, who doesn't want to do anything as long as nobody is reported missing.
The body of a young woman is found in the singing booth of a recording studio. Lea Neumann had just recorded a song at the time of her death - and so her sudden death is also recorded on the audio track. Lea was poisoned.
A woman's body is found in a field near Leipzig. Sophie Homberg gave birth to a child shortly before her death - but the baby is gone. According to witnesses, extraterrestrials seem to be responsible for the child's death and kidnapping.
Dagmar Schnee has been receiving anonymous letters for a few days: A colleague is being bullied. When Ina Zimmermann finds a bloody doll with a death threat, there are growing signs that this case is serious.
A young man, Lukas Fischer, dies in hospital from an overdose of crystal meth. Jolle Strand, Lukas' best friend, comes to the police headquarters the next morning. He claims Lukas was killed by his girlfriend Jenny Kramer.
The corpse of the historian Wolfgang Folkert is found on the steps of the Monument to the Battle of the Nations. Hajo seems unusually upset since arriving at the crime scene. Apparently the place brings back unpleasant memories for him.
In the luxury boutiques of Leipzig, three wealthy Russian women make their black credit cards glow. They spend a few days in the city for a shopping trip. But the fun doesn't last long. Danyanka Mashakova is found dead in her hotel suite.
Nurse Lukas Kippler is pushed out of the window in a nursing station. The only eyewitness is a locked-in patient. Although Sandra Buschhaus is fully conscious, she cannot communicate with her outside world.
In the middle of Leipzig, a masked man stops a car. He shoots the driver in cold blood and escapes with a bag full of jewelry. But the victim, student Louis Rother, was not alone in the car.
SOKO is concerned with the murder of the beautiful visiting student Zahra Rahman from Pakistan. Much to the chagrin of her parents, she has started an affair with a married businessman. In her homeland, adultery is frowned upon.
Volker Junge is arrested on suspicion of murder. He was found with the murder weapon next to the body of his former colleague Martin Klausen. But Volker denies having killed his colleague.
Jan takes part in an LKA course. There he gets an offer to work as a police officer for the U.N., but he would have to move to New York. Before he has time to really think about the offer, SOKO has to solve the murder of Patrick Brenner.
During the court break, a dispute between the brothers Hannes and René escalates and ends in a violent fight. Teacher Mrs. Canarius pronounces the reprimand against René. Shortly thereafter, she is found dead in her biology cabinet.
Rather by chance, SOKO gets on the track of an almost perfect crime: A young couple finds the body of the Mannheim businessman Thomas Häberle in the forest - neatly sawn into 50 parts and packed in plastic bags.
After the argument with Jan and his collapse, Hajo is in the hospital. He doesn't want to hear Jan's apology. Suddenly, the police are called to a hostage situation in a neighboring ward of the same hospital.