The 16th case for East Frisia's top investigator Ann Kathrin Klaasen by number-one bestseller author Klaus-Peter Wolf. The call reaches Ann Kathrin Klaasen and Frank Weller while they are walking on the deserted beach. A man's body has been found in a holiday apartment on Wangerooge. The manner of the killing suggests that organized crime is responsible - a suspicion that immediately puts Ann Kathrin and her team on high alert. Shortly thereafter, another murder occurs in a wildlife park. Under intense pressure, the police search vacant holiday apartments after all tourists had to leave East Frisia. Where is the killer hiding? For Ann Kathrin Klaasen and her team, an investigation begins under unprecedented conditions.