At the Japanese Embassy in a certain South American country, Ambassador Daitake Chiyo (played by Matsumoto Koshiro) is a cold and harsh person, extravagant and extravagant. He uses his power to make a lot of money, which has caused complaints from local people. At the important moment when the Minister of Foreign Affairs is about to visit, Kawakita Ken (played by Oikawa Mitsuhiro), as a counselor, is unwilling to get involved in the quagmire again and prepares to hold a media conference to make the ambassador's crimes public, which also leads to his own death. At the same time, Furuhata Jinsaburo (played by Tamura Masakazu), who happened to be on vacation in South America, was forced to stay because his passport was stolen by a monkey. Fortunately, he met the ubiquitous Hanada (played by Yashima Tomoto) and temporarily found a place to live. Soon after, the blackmail letter kidnapping Kawakita was delivered, but this blackmail letter with many doubts immediately aroused the suspicion of Detective Furuhata... This film is the fifth SP of the "Furuhata Jinsaburo" series.