A movie in which drug G-men play an important role in a big city where prostitution and drug organizations intervene. The Ministry of Health and Welfare's Narcotics Control Headquarters, which emphasizes the reality of the dark prostitution route in the city, which is said to be a hotbed of evil, sends in one talented G-men, Shiro Muraki. The drug G-Men, who succeeded in infiltrating alone, roams Turkey, cabaret, bars, etc., catches information that leads to the dismantling of the organization, and with the support of the city authorities, dares to challenge the organization.