At the Christmas party of an insurance company, there is a relaxed atmosphere with karaoke and lots of alcohol. The next morning, an employee lies dead in the foyer, apparently fallen down from a high balustrade. The inspectors Thorsten Lannert and Sebastian Bootz try to reconstruct the evening. One thing is clear: Department head Oliver Jansen and his self-confident colleague Kim Tramell, the dead man's competitor for a lucrative job assignment, were the last to leave the house. Neither of the two wants to have seen anything. But under pressure career woman Kim Tramell declare that Oliver Jansen raped her. He in turn speaks of seduction and consensual sex. Which of the two exposed themselves to blackmail and then got a witness out of the way? The commissioners find a video with unambiguous scenes that the slain Idris Demir recorded himself on his last evening. But for whom is this video fatal?