Back cover: A lavish family celebration that turns into a nightmare. Fear grips the Altes Land region. The so-called "groom" repeatedly abducts women without leaving a trace. His victims are never found. The only clue: an anonymous wedding announcement in the local newspaper, followed shortly after by an obituary. At a family gathering, architect Nora and her younger sister Sofie learn about his crimes. They dismiss it all as a ghost story. But the next morning, Sofie has disappeared. Although the police are investigating under intense pressure, the inquiries quickly reach a dead end. Soon after, Nora's greatest fear becomes a horrifying certainty: In one of his macabre advertisements, the groom announces his impending marriage to Sofie. If Nora wants to save her little sister, there is only one way: She must confront the murderer face to face. And she doesn't have much time before he gives her his deadly "yes"...