A mysterious series of deaths is gripping the East Frisian town of Aurich. Konrad Uhlig, a resident of the exclusive senior living facility Heimathafen, dies under unexplained circumstances. Shortly thereafter, Claudia Behrends, a nurse at Heimathafen, is found murdered. Is there a connection between the deaths? And what role does Konrad Uhlig's massive inheritance play? Particularly explosive: Heimathafen belongs to the family of investigating Commissioner Ralf Toben, and his cousin, the head of the residence, becomes a suspect. When the East Frisian police hit a dead end, Dr. Josefine Brenner goes undercover to investigate: Together with her friend Theda, the retired forensic scientist checks into the senior residence. Soon they make a discovery, and gruesome details come to light. And it becomes increasingly certain: The murderer is very close by.