The body of young Christa Gellert is fished out of the water in a small town on the Elbe in the spring of 1964. Everything points to an accident - Christa drowned while picking willow catkins during an official trip with town councillor Stegmeier and his colleague Anna Sell. That's what the people involved say, but then rumors start to spread. Detective Hans Gregor investigates. His boss Erwin Müller, who has known the councillor for many years, is unamused. When questioning the witnesses, Gregor only comes across hints. An exhumation of the dead is carried out. It is discovered that Christa was pregnant. Her colleague Helga, a former student on probation, knows about the councilman's relationship with Christa. But she is afraid to testify. Gregor has to fight his way through a web of dependencies, career thinking and mistrust until he solves the case.