In the year 2014, Japan's economic collapse spurred a mass exodus of its people to a sprawling refugee city where Asian communities converged in a struggle for survival. Among them were three orphan boys, Shin, Toshi, and Seiji, whose daily life relied on stealing to survive. During a botched robbery, Shin meets Ren, a youthful-looking man who reveals himself to be a vampire. Ren intervenes, saving Shin's life and forging an unlikely friendship that evolves over the years. By 2024, Shin is all grown-up, leading a gang together with Ren and Toshi.
During one of the robberies against another gang, they cross paths with a Taiwanese named Huang Lee who wants to get revenge on the local gangsters who harmed his sister, Mai Ling. Now, Lee and Mai Ling joined Shin's friend group, united by shared pain and the harsh realities of their world. However, a grisly event happened, which not only took Toshi's life, but also forces Ren to reveal his vampire nature to protect his friends. Ren disappears, leaving Shin to grapple with loss and betrayal as alliances shift in the turbulent underworld. Years pass, during which Shin navigates the treacherous dynamics of power and survival, but the worlds of Ren and Shin are on course for one last collision.
