In a quiet Tokyo district, Takashi, a skilled and introspective chef leading a solitary life, runs a small sushi bar. His calm existence is suddenly disrupted by the reemergence of his violent past as an elite assassin. Takashi belongs to a clandestine organization that breeds ruthless killers, and despite his attempt to live a simpler life, he is thrust back into a world full of danger after an old colleague, Jun, seeks his help. Jun, now a target himself, has crucial information that could expose their organization, prompting Takashi to protect him while navigating the renewed shadows of betrayal and secrecy.

As tensions rise, new adversaries emerge, revealing a conspiracy that goes deeper than Takashi or Jun imagined. Cut off from his old life and battling inner demons, Takashi must use both his lethal skills and wits to survive. Amidst the growing threats, Rina, a young woman linked to Jun's past, becomes unexpectedly involved, creating a trio bound by necessity. Together, they learn that they must confront not only external threats but the burdens of past choices. As they delve deeper into the web of deceit, loyalty and survival become intertwined, forcing Takashi to confront a path defined by violence against his desire for peace.