S1, E6: During a routine patrol, Hubert and Staller discover a dead body on the shore of Lake Starnberg. According to the autopsy results, 31-year-old Sabine Pfeifer drowned two days ago. Bruises and a cut indicate that the young woman either fell or was forcefully pushed into the water. In the victim's apartment, the police find an invitation to a wedding reception on the MS Starnberg, also from two days ago. Hubert and Staller pay a visit to the bride and groom. The bride, Eva Kern, is shocked, and the men learn from her that the victim was not only a good friend, but should also have been her maid of honor. Sabine Pfeifer's disappearance that evening, however, allegedly went by just as unnoticed by Eva Kern as it did by Captain Walther Thiel, whom Hubert and Staller pay a visit to on his ship. The ship's waiter, Robert Sachs, is also unable to provide any clues, but he somehow looks familiar to the two investigators. Meanwhile, the bride's wealthy and influential father, Günter Kern, urges Girwidz not to spoil the most beautiful day of his daughter's life by questioning her unnecessarily, especially since it could still be an accident. This is further substantiated by the fact that, according to pathological examinations, the victim was heavily intoxicated. This result is confirmed by Markus Ziegler, the future groom, who – like everyone else – claims not to have noticed the young woman's disappearance. However, Hubert and Staller learn from one of the victim's colleagues that Markus Ziegler had an affair with the drowned woman not long ago...