Ellis Peters has been writing high colored romantic suspense stories with kitsch-ig European backgrounds like this one for years. Maggie Tressider, a concert singer (by the tone of the book, a soprano) wakes up after an accident haunted by the notion-obsession she's killed someone. She hires a detective who promptly falls in love with her and stays on the case after she dismisses him. It takes them both to a small town near the German border, revives an old murder, prompts another one. . . . For that credibility-gullibility gap.