故事的主角，苏黎士州警察局的探长马泰依中尉，按局长Ｈ博士的评价，虽然是一个卓越的犯罪学家，具有一流的头脑，任职期间成绩可观，但生性孤僻，毫无幽默感，为人拘谨多礼，不嗜烟酒，也没有结过婚，除了不知疲倦地工作，他不考虑任何别的东西。跟他打过交道的同事，全都在 The protagonist of the story, Lieutenant Ma Taiyi, Inspector of the Zurich Police Department, according to Dr. H, the director, although a brilliant criminal scientist with a first-rate mind, achieved impressive results during his tenure but was rather withdrawn with no sense of humor , Cautious and courteous, indulging in alcohol and tobacco, and not married, except for his tireless work, he does not consider anything else. All the colleagues who dealt with him were all there