In feudal Japan, Kurou and his servant Benkei are fleeing from Kurou’s elder brother, who has recently ascended to the throne. In a forest, they come across a house and a strange woman by the name of Kuromitsu, who agrees to harbor them under one condition: that they do not peer into the inner chambers. Soon, they are attacked by the Red Army; they are searching for Kuromitsu, whose blood holds immortality. Fatally wounded, Kurou drinks some of Kuromitsu’s blood and gains immortality along with strange abilities; but shortly after, Kurou is seemingly decapitated and wakes up centuries later in a ruined city. In this twisted future the Red Army is omnipresent and still searching for Kuromitsu’s blood, while a rebel army seeks to keep them from acquiring it. With threats at every turn and fueled by his obsession, Kurou sets forth to find Kuromitsu and seek his revenge on the Red Army.Adaptation of Takashi Noguchi’s manga, which itself adapts Baku Yumemakura’s supernatural romance novel. The original novel is about a 12th-century man named Minamoto no Yoshitsune (Kurou). Kurou flees into the mountains after losing to his brother Minamoto no Yoritomo, the first Shogun to rule all of Japan. History records that he committed suicide, but instead, Kurou meets a strange, beautiful woman named Kuromitsu in her mountain hermitage. Eventually, Kurou falls in love with Kuromitsu, but then realizes she conceals a dark secret. He learns that he is unable to die and continues to live for a thousand years as Japan evolves into a future society.