Tajima is a private detective in charge of his own company, Detective Bureau 2-3. When warring criminal gangs go overboard by robbing U.S. military munitions, Tajima steps in to stop what the cops can't.
Arriving in the town of Hakodate, a wandering musician, Shinji Taki, is soon recruited by the local gang as a hired hand. However, with the arrival of a sinister gunman, Taki's mysterious past catches up with him.
A young doctor falls into a despair of developments. He plans to revenge the disgrace inflicted upon his sister, whose engagement was broken as a result.
