Giri/Haji follows Kenzo Mori, a Tokyo detective who travels to London to search for his younger brother, Yuto, who is presumed dead but is actually suspected of murdering a member of the Yakuza. As Kenzo navigates the unfamiliar and dangerous underworld of London, he becomes entangled with a struggling detective, a half-Japanese sex worker, and a dangerous crime syndicate, all while trying to prevent a brewing gang war that threatens both cities. The series is a genre-bending crime thriller that explores the concepts of duty and shame through the lens of two brothers on opposite sides of the law. It is noted for its unique visual style, which frequently incorporates dance sequences and meta-theatrical elements to represent the internal emotional states of its characters, blending gritty noir aesthetics with moments of surrealism and profound human connection.