Fukuoka's underworld runs on a simple rule: everyone has a price, a method, and a reason to kill. When a hitman shows up dead with no motive attached, every professional in the city becomes both hunter and hunted. The mystery isn't who killed him, it's whether the killer of killers is cleaning house or settling a debt that goes back further than anyone remembers.
Fukuoka's Hakata ward operates by its own rules. Killers, fixers, detectives, and revenge specialists conduct business in the shadows while the city sleeps, each profession intersecting in a dangerous underground economy. When a mysterious figure begins eliminating professional assassins, the balance shifts. Nobody knows who this "killer of killers" is or what they want, but bodies start piling up and paranoia spreads through the criminal underworld like poison. A burnt-out detective, a cheerful hitman, and various other players caught in the chaos must navigate a web of conspiracies and betrayals to survive. Every character operates with their own agenda. Every conversation could be a setup. Every ally might become a corpse by sunrise. The show moves between dark comedy and genuine tension, treating its criminal cast with surprising humanity even as blood spills across neon-lit streets. Expect sharp dialogue, unexpected partnerships, and a mystery that rewards paying attention to every detail and every character's true motivations.