Yajû no seishun

Joji Mizuno (Joe Shishido), a former detective fired after being convicted of embezzlement, infiltrates the Nomoto organization to find out the truth about his partner's death. He partners with a young soldier named Goro Minami (Eimei Esumi) and earns the respect of the eccentric head of the Nomoto group, Tetsuo Nomoto (Akiji Kobayashi). Mizuno is approached by Keiko (Naomi Hoshi), one of Nomoto's mistresses, who blackmails him into helping her identify and kill the sixth mistress, who secretly runs the prostitution racket. Mizuno learns of a planned multimillion-yen drug deal and brings the information to Onodera, laying out a plan for the Sanko men to steal the money and blame Nomoto Enterprises.