Love knows best.

Emma Mayer works as a presenter for a radio station. In her show 'Emma after midnight', she listens to the concerns of callers. She discovers that Katharina Holl, who is about to go on trial for involuntary manslaughter during the construction of an indoor swimming pool, is suicidal. Since the accident, she has been called Mrs. Hell by the press and while she, as the main defendant, has to shoulder all the blame, accomplices such as Lord Mayor Klaus Quade and the owner of the construction company, Mark Wahrendorf, remain on the outside. Emma has little time to deal with Katharina's problem and convince her that there is a point in continuing to live.