A pessimistic man nearing thirty, desperate and disillusioned, accepts a high-paying but illegal job. He and another thug are given a simple task: rob a bag from an old woman. What should be an easy payday descends into immediate chaos when the elderly target pulls out a gun and shoots his accomplice in the head. The man flees in terror with the bag, and only when he believes he is safe does he dare to open it. Inside, he finds the severed head of the current Prime Minister of Japan. His world shatters not just from the horror in his hands, but from the television blaring in the background, where the very same Prime Minister appears live, speaking to the nation.

The story is set in a contemporary Japan haunted by political rot and social decay. The setting is not a world of heroes, but the grimy back alleys and cramped apartments of the underbelly, where society's cast-offs are forced into desperate acts. The protagonist is defined by his bleak outlook and cynical acceptance of a world that has left him behind. His initial low-level criminal task spirals into a labyrinth of conspiracy when he becomes the unwitting possessor of a political assassination, leaving him hunted by unknown forces and questioning the very nature of reality as the line between the real Prime Minister and a potential doppelganger blurs.

As the series progresses, narrative arcs focus on the fugitive’s attempts to survive while holding the ultimate political weapon. The hunt to retrieve the head pits him against shadowy intelligence agencies, ruthless fixers, and perhaps a faction conducting a secret political coup using body doubles. Future chapters reportedly explore the origin of the head and the prime minister on screen, delving into themes of state power, media manipulation, and the disposable nature of individuals caught in high-stakes political games.