Inspectors Simon Kessler and Hella Christensen are unalike but effective as they take on cases in the fictitious small town of Nordholm. The Girl on the Beach is the third two-parter of the series.

During a high school party on the Nordholm beach, a young student disappears. Her body is found on the cliffs the next morning. Kessler suspects a link between the student and a girl who was murdered in Hamburg. Christensen, who has recently retired from the force, investigates on her own initiative.