Borchert and his office manager Dominique know little about Regula Gabrielli's past. The youthful indiscretions of his highly esteemed legal assistant come to light when she becomes involved in a murder case.

After many years abroad, lawyer Thomas Borchert makes a surprise return to his hometown of Zurich. He wants to gain some distance in a trailer on his family's once stately estate, and escape the clutches of the German authorities. His former employer, the FonSonic Group, has fired him without notice due to a bribery scandal in South America. Two of Borchert's colleagues were also involved in the company's dirty dealings. But since one committed suicide and the other went into hiding, Borchert is to be branded the sole scapegoat. Although he is prepared to take responsibility for his misdeeds, he also tries to put a stop to FonSonic's activities. To do so, he wants to find evidence at a Swiss bank. But soon Borchert finds himself in new trouble.

Kissing before Customers, that's Gretchen and Sarah's motto. And both are flirting with the enenmy. Literally. Clemens, who with his business partner is after the same assignment as them, is the center of their attention. When it comes to his intentions, though...

Kindergarten teacher Hannah lovingly creates a calendar of activities for the coming year to get her relationship with her boyfriend Simon back on track. Through a mishap, however, the calendar falls into the hands of misanthropic Jonathan, a wealthy publishing heir who sets out to find the author with growing curiosity. Miraculously, the paths of the two cross from then on, for the time being without knowing of their connection through the calendar.

Hans Siegenthaler is firmly convinced that Bernadette Schanz stabbed his daughter to death out of jealousy. However, the woman was acquitted in a criminal trial. When Schanz and her husband Beat are shot with Siegenthaler's rifle, the man comes under suspicion. Instead of trusting the justice system, he goes into hiding, making himself even more suspicious. Borchert and Dominique believe in his innocence and want to help him.

Borchert hates it when people lie to him. From his very first meeting with murder suspect Xavier Schliemann, he has doubts about the man's sincerity. The smart diamond dealer is accused of shooting his ex-business partner. Instead of testifying to Captain Furrer as agreed, Xavier goes into hiding. Then, contrary to expectations, the enraged Borchert stumbles upon evidence that exonerates his client.

Tom does not have it easy. At the student theater, his friend Jan and his beloved Annelie play the leading roles; the inconspicuous Tom, on the other hand, makes the prop. When he realizes that he must finally take his life, and especially love, into his own hands, he turns to his janitor, Mr Müller. What Tom does not know: Müller was once a psychologist of the Stasi! In the so-called "Romeo" program, he prepared male agents to address women in Germany and make them available as a source.

Thomas Borchert is already looking forward to his goddaughter Jenny, who is completing a practical semester in Albania. At the airport, as part of the baggage check, half a kilo of hashish is seized from her, which Jenny claims she did not know anything about. Borchert and Dominique Kuster want to find out who could have put the hash on her. They also have to solve the murder of an entrepreneur who was involved in crooked business.

Borchert wants to toast three years of successful cooperation with his superior Dominique Kuster and her father, Reto Zanger. The evening is canceled because Reto Zanger is called to Geneva at short notice for a mandate. His daughter is therefore supposed to represent him at a court hearing in Zurich. The trial takes a dramatic turn when inmate Alexander Böni takes those involved as hostages.