Longtime friends Noah and Hakim fall in love with the same woman. Charlotte is a photographer from Bavaria, blonde, blue-eyed, German and Catholic. Noah is Jewish and Hakim is Muslim. The tension between the two friends, the religions and the previously friendly families is thus established.
Policeman Koops witnesses a car accident. The dying driver gives him an envelope with the part of a code. Shortly thereafter, Koops gets in the sights of a contract killer.
The worn-out ex-journalist Ralph has to work as a substitute teacher at an evening school and in the end learns more than his protegees.
Luna Kunath (Caroline Erikson) and Tamara Meurer (Anjua Pahl) work together in the Potsdam murder commission. Luna is single, strong, assertive, funny, empathic, sporty and fast in the head. It is an excellent policewoman whose carefree always accompanies with a little naivety and brings you again and again in brenzy situations. Tamara, however, has more mature, adult. The two of the boss Bernhard Henschel (Michael Lott) and the colleagues David Grünbaum (Omar El-Saeidi), Christoph Westermann (Hendrik von Bültzingslöwen), lail-sure Thomas Brandner (Yung No) and legal physician Werner Vense (Bernd Stegemann). Potsdam, Berlin's pretty little sister, confronts the commissars again and again with a wide variety of life effects. However, the team not only determines in Potsdam, but must always be out of the surrounding area. Because the crime does not stop at the city limit.
