胡大侦探接到秦堪新的电话，请求他辨别四个自称是著名侦探霍桑的人。胡大侦探先后探访四个地址，每次都误以为找到了霍桑，但实际上这些人分别是律师、学生和演员。最后，他发现所谓的霍桑其实是作家程小青。秦堪新承认这只是个玩笑，霍桑是小说中的人物，地址是随意编的。胡大侦探感到既尴尬又无奈。

detective Huo Sang. Detective Hu visited four addresses one after another. Each time, he mistakenly thought he had found Huo Sang. But in fact, these people were a lawyer, a student, and an actor respectively. Finally, he found that the so-called Huo Sang was actually the writer Cheng Xiaoqing. Qin Kanxin admitted that this was just a joke. Huo Sang is a character in a novel, and the addresses were made up randomly. Detective Hu felt both embarrassed and helpless.