Sabu, a low-ranking samurai, finds himself unable to apprehend the ruthless leader of a violent gang of thieves, which leads to a scolding from his fellow friend and leaves him feeling disheartened. Meanwhile, Ichi, a blind masseur is called upon to provide a massage while passing by the residence of Iwashiroya, a prominent tea wholesaler in Edo. To his surprise, one of Iwashiroya's mistresses, Oshin, reacts unexpectedly upon seeing Ichi's face. Later that night, while returning home drunk, Ichi faces an attack by a ronin, whom he successfully overpowers and kills. Later Ichi accompanied by Sabu, revisits the scene, only to discover that the victim was not a ronin but rather an ordinary townsman. Subsequently, it comes to light that the victim was the sole heir of Iwashiroya. They have fallen into a trap. As rumors circulate that Ichi is the culprit, he is captured and subjected to torture, resulting in him being left critically injured...