The bad coffee and the pungent smell of sausage in the cafeteria of the spa clinic on the Baltic Sea beach vividly remind Chief Inspector Angermüller of his visits to his wife. Now he has official business there: Maren Seemann, the unpopular clinic manager, did not survive her muesli breakfast. A day later, Chief Physician Dr. Paulsen is found dead in his office. Next to his body, a mysterious stone with a wing symbol is discovered. Just like the one found next to Maren Seemann...