When the Turkish entrepreneur Ercan Celik is run over with his own van and dies, Lena Odenthal and Mario Kopper get support from the LKA. There one suspects the act of a serial offender who has been executing businessmen of Turkish origin for some time. However, Lena's investigations also provide indications that the crime could have something to do with the Sahins' family situation , because Ercan Celik ran his business together with his brother-in-law Önder Sahin. While Önder was striving to trump his more successful brother-in-law, Ercan's wife Derya was trying to gain freedom in their arranged marriage. And then there's Peter Bogner, who was spotted near the crime scene and has a hard time hiding his affection for Derya Celik.