During the early 16th century, idealistic German monk Martin Luther, disgusted by the materialism in the church, begins the dialogue that will lead to the Protestant Reformation.

In the brutal trench fighting of the First World War, a British Infantry Company is separated from their regiment after a fierce battle. Attempting to return to their lines, the British soldiers discover what appears to be a bombed out German trench, abandoned except for a few dazed German soldiers. After killing most of the Germans, and taking one prisoner, the British company fortifies to hold the trench until reinforcements can arrive. Soon, however, strange things being to happen as a sense of evil descends on the trench and the British begin turn on each other.

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.

Ben Winter returns from his tour in Afghanistan with the German ISAF. Having survived a suicide bombing, which claimed the life of his best friend, he is trying to find his way back to his old life, with his girlfriend, family and friends. But his memories are catching up with him. Increasingly, he is losing contact with reality and his trauma gets the upper hand. A near-accident makes him and his family finally aware of the deep-rooted trauma and feelings of guilt he brought back from Afghanistan and he checks into a veterans' hospital for treatment.

Annika's life and experiences as a young woman include peculiar sex, an unfortunately cold best friend, a terrible tutor/boyfriend, and a sensible and beautiful boyfriend (Kai). Her family life and lie collide in such a way that it is impossible for her to tell the truth even when she desperately wants to.

Emily (8) is terminally ill. Her parents ask the new CEO of a small pharmaceutical company, Dr. Julia Schemmel, for the early release of a drug that is not yet ready for the market. Dr. Julia Schemmel is to consolidate the company. The young company has to invest hundreds of millions of euros for each drug and is planning to go public. At the same time, Michael and Nicole Wagner receive the diagnosis that their daughter is suffering from incurable childhood dementia. During extensive internet research, Michael finds out that the pharmaceutical company "Berner & Braun" is researching a cure that has already been tested on people in Asia. It is said to slow down the progression of the disease, possibly even stop it. Together with other affected parents, the Wagners demand a study for children in Germany and the release of the drug.

In 1981, all of Germany fears for the life of Johannes Erlemann, the eleven-year-old son of entrepreneur Jochem Erlemann, who was in custody on suspicion of fraud at the time of his son's abduction. The boy was snatched off his bicycle by his kidnappers, put into a van and then spend two terrible weeks in a shed in the forest fighting for his life having been chained to a wall and left without daylight, while the kidnappers try to extort a large ransom from his wealthy parents.

When a poison attack is made on the racehorse Cagliostro, Lou flees the Immenhof with the horse. Together they find refuge with Cal, who lives away from civilization with his semi-wild horses. In his new home, Lou makes the horse promise that it will never have to take part in a race again. However, this is by no means the end of the threat to Cagliostro.

Georg and Regine Schlegel, both behavioral scientists, are involved in a traffic accident while their three adult children make preparations for their 40th wedding anniversary. The fact that there appears to be no will and that they all have very different ideas about what should happen to their parents' house reignites old conflicts.