"Hakuōki: Record of the Jade Blood" is a historical fantasy anime set in the late Edo period of Japan, blending supernatural elements with real historical events. The narrative centers on Chizuru Yukimura, a young woman searching for her missing father, Koudou Yukimura, a doctor who has been researching a mysterious elixir known as the "Water of Life." Her journey leads her to Kyoto, where she encounters the Shinsengumi, a group of elite samurai tasked with maintaining order during a time of political upheaval.

Chizuru becomes entangled with the Shinsengumi after witnessing a battle between the group and supernatural beings known as the Rasetsu, humans transformed into powerful, bloodthirsty creatures through the Water of Life. The Shinsengumi, led by the stoic and disciplined Isami Kondou, includes key figures such as the skilled swordsman Toshizo Hijikata, the calm and strategic Souji Okita, and the reserved yet perceptive Hajime Saito. As Chizuru stays with the group, she discovers that her father’s research is deeply connected to the Rasetsu and the Shinsengumi’s own struggles.

The plot delves into the political tensions of the era, particularly the conflict between the Tokugawa shogunate and forces seeking to restore imperial rule. The Shinsengumi, loyal to the shogunate, face increasing challenges as the Rasetsu threaten both their mission and their humanity. Several members of the group, including Hijikata and Okita, are forced to consume the Water of Life to gain the strength needed to combat these threats, but at the cost of their own humanity, as they risk becoming Rasetsu themselves.

Chizuru’s presence becomes pivotal as her unique heritage is revealed—she is a member of the Yukimura clan, a lineage of oni, or demons, granting her longevity and resilience. This revelation ties her fate even more closely to the Shinsengumi and the ongoing conflict. The series explores themes of loyalty, sacrifice, and the cost of power, as the characters grapple with their ideals and the harsh realities of their world.

The narrative is driven by the interplay between historical events and the supernatural, with the Shinsengumi’s struggle against the Rasetsu serving as a metaphor for the broader societal changes of the era. The characters’ personal journeys are intertwined with the larger political and supernatural conflicts, creating a layered story that balances action, drama, and emotional depth. "Hakuōki: Record of the Jade Blood" builds on the foundation of its predecessor, "Hakuōki: Demon of the Fleeting Blossom," expanding on the lore and deepening the relationships between the characters.