Thief Yaheiji (Keizo Kanie) helped a dying young samurai (Hiroaki Murakami), after recovering, he lost his memory and returned to Edo under the name of Yataro Tanigawa. Yaheiji meets Yataro again in Edo, by which time Yataro has become a dark hunter (Hired Assassin). The boss of thieves to whom Yaheiji obeys is killed, and Yaheiji participates in the battle to take his place Yataro helps him defeat and save his life, and Yaheiji also tries to save Yataro from the world of assassins...  The drama "Dark Hunter" is based on the novel by Shotaro Ikenami, who is best known for his TV series Onihei Hankacho, Kenkaku Shobai and Fujieda Baian's Shikake-nin. The film version directed by Hideo Gosha is well known, but this version is more faithful to the original.