Jan is an absolute heartthrob and a diehard Hertha fan. Katrin is attractive, just as successful and an incorrigible romantic. Chance makes the two the ideal couple. At least almost. Everything would be perfect if the two flagship models of their species did not lapse into primeval behavioral patterns. And so Jan sinks a little too deep in the cleavage of his secretary Melanie, and Katrin can not resist the adventurer Jonathan's lead role.

Constance, 1410. Marie, daughter of the richest bourgeois of the city, is on the eve of marrying a prestigious lawyer, son of an earl. Although the compromise fills with pride the girl's father, anxious to ennoble, Marie is not just convinced about her fiancé, who she has only seen twice. Her suspicions are confirmed tragically on the eve of the wedding when, after signing the marriage contract, a stranger breaks into the house ensuring that Marie has slept with other men in exchange for gifts, like a vile harlot. From that moment, the life of the girl will give a terrible unexpected turnaround. Alone, with his reputation ruined, she will have no choice to survive than partnering with a prostitute and lying on the roads.

Sauerland, autumn 1995: In the middle of the forest on the Wilzenberg, a walker finds the body of high school graduate Sonja Risse. However, the fact that the killer left a music box with the lullaby "Hush Little Baby" at the crime scene does not lead to a clear solving. 25 years later, the investigative journalist Stefanie Schneider, known as "Mütze", made a surprising discovery in Cologne. In a disused multi-storey car park, she films an undressed corpse of a man with a music box running next to it! When her colleague Jan Römer, who reported on the spectacular Sonja case as a young journalist in 1995, recognizes the melody from back then, he immediately believes there is a connection. He goes to Wilzenberg with his ambitious colleague to interview Sonja's mother Maria, her former teacher Waldheim and her best friends. The more the journalists compile, the clearer the contradictions and gaps that the investigators should have noticed at the time.

Kerstin is a successful department head of a tax consulting firm in Berlin. She is respected and feared by her employees. Only one thing is too short in her life: for years she had no sex and no husband by her side. At the company, she wants to show that she can also party properly. The next morning, she wakes up in a hotel bed with two employees next to her: the hated opponent Simon and the "footman" Gregor. With the aid of her assistant Achim, she has lost all the memories of the previous evening. Her employees are forcing her to silence. Four months later, she realizes that she is pregnant and one of her nightmares is the father.

Casual single man with daughter meets smart single parent with son - sounds like a good start! Unfortunately, the omens are anything but favorable: neither of them feels like getting to know each other today of all days. The perfectionist chef is under pressure because she wants to serve up the best spaghetti bolognese of her life at a test cooking session for her dream job that evening. Philipp has to prove himself in a difficult group at his new job as a tourist guide. An aerial bomb that paralyzes Cologne's city centre means extra stress to the power of three for the two of them! The single parents spontaneously join forces: She looks after her seven-year-old son Fritz and his daughter Miriam, who is the same age, in the morning, while he takes care of the children in the afternoon.

Marion, a Berliner facing child custody and job loss as her ex Felix oversees her factory’s insolvency, scoffs at the idea of a savior, until Robin Hood appears in her kitchen. Believing medieval justice can fix modern woes, he takes on Felix to help Marion.

At a motivational seminar, seminar leader Marius meets Jörg, an Ossi who doesn't understand. When Marius teaches him how to open a door with the right attitude, suddenly none of the participants can remember them. They are forgotten by the world, dependent on each other. Marius discovers that opening doors in the parallel universe creates unexpected opportunities for them to change places at will and live freely. But life as a couple brings with it tensions.

1818 in the Münsterland: Innumerable pilgrims seeking comfort and consolation visit the bedside of Anna Katharina von Emmerich, a nun whose body bears marks of the holy wounds of Christ on her chest, forehead and hands. Clemens von Brentano, an artist in his prime, visits the nun′s sickbed as a simple "writer of the wonders of God" to take down her visions and beliefs. He believes himself to be in charge of his life as a devout Catholic. The former rake′s encounter with the charismatic nun proves fateful, however. For both of them.

Rodolpho Aranda, head of an Argentinian chemical company, is found murdered in a Berlin bookshop: An elderly librarian named Valerie Steinfeld poisoned him with cyanide and then took her own life. As the LKA was unable to establish any connection between the victim and the perpetrator, the motive for the crime remains unclear. When Aranda's son Manuel arrives to transfer his father's body to Argentina, the case is officially closed. Instead of an explanation, the young doctor only receives a sealed zinc coffin - the search for the truth is left to him.

By pure coincidence, the millionaire Maximilian met a doppelganger who a little later turned out to be his twin brother Lukas.