For six young men, who could hardly be more different from one another, the fan club of the Eintracht Braunschweig football club is the center of their life and their friendship. 66/67 is the name of their club as well as the year in which Eintracht Braunschweig won the German Championship.

After greengrocer Mehmet Üsker is murdered, police detective Inspector Menemenci is put on the case. At the same time, detective Vera Gemini is on the lookout for a former foreign legionnaire who, however, has been presumed dead for years. It soon turns out that there must be a connection between the two cases.

Three years after his conviction for drug trafficking, Erich Kessel is about to be released from prison. It's a particularly trying time for this addiction-free former narcotics officer, whose seriously ill daughter has just died. With his wife, Claire, ready to give him a second chance after years of separation, and his former colleague and friend, Superintendent Mario Diller, having found him a job as a bartender, Kessel is determined to prove himself beyond reproach. But shortly before his release, the double murder of a young drug dealer and his fiancée, daughter of the powerful Syrian crime boss Walid Schukri, threatens to ruin his fine promises. The latter, who is serving a long sentence alongside Kessel, offers him a handsome sum to catch his daughter's killer. For the former commissioner, now broke, the temptation is great to accept this juicy contract, the ultimate investigation on the frontier of legality.

After two pregnancies, Sonja struggles with her body feeling and the relationship with her husband Milan. Frauke, shortly before her 60th birthday, shares this fate and feels almost invisible to her husband. Daughter Julie is working on her modeling career, but a flaw is discovered on her body again and again ...

In his own Hotel Ritz, Sophie mistakes Johannes for the expected temporary waiter and is quickly trained in the supposed task. Johannes gets involved and gets to know the hotel business and the employees from a new perspective.

Carola Weber is shocked when her husband Jochen introduces his new colleague from the hospital: she knows this voice. Hearing it catapults Carola back to the worst time of her life, her imprisonment in the GDR women's prison Hoheneck. She is convinced that Prof. Wolfgang Limberg was the doctor who treated her there with psychotropic drugs in order to force her to testify, and thus caused her to lose two fingers while working on the conveyor belt. Carola's career as a pianist was over forever.

Shortly before her 40th birthday, the successful surgeon Anne May is plagued by self-doubt: Actually, she would have to be satisfied, since she has long been married to her childhood sweetheart Peter and has built up a working family life with him. Nevertheless, Anne is deeply unhappy. When her husband is on a business trip, she meets Carolin Winter, the mother of a school friend of her son. Quickly, the two women make friends, Anne gets carried away by the joie de vivre of the native Chilean.

Police officers Kessel and Driller are supposed to be on the lookout for an internationally wanted war criminal. But Kessel is a junkie, gets into a fight with a young dealer and runs the man over. His colleague Driller covers all the tracks, but cannot prevent an ambitious public prosecutor from trying to solve the incident. However, the two of them have a much bigger problem: the crime has made Kessel vulnerable to blackmail.

Richard and Amira have long been friends. Together with their partners Livia and Martin and their children, they spend every summer holiday in the Algarve. But this time everything is different: Amira can’t get away because of her job – and Livia finds out that her husband Richard has a lover. Holiday together? Impossible! On the other hand: why should they all go without? So Livia und Martin head South with the kids. There they find out that they don’t really know each other and aren’t even really friends. Or are they in fact more than that?

"Die Mamba" is a top international terrorist. A deadly hand-to-hand fighter, sniper, explosives expert and master of masks and deception. Hossein Sarivi is a good husband and sound designer in a cookie factory. The two look very much alike, but their lives have had no points of contact. Until now...