Bob Lee Swagger je vysloužilý veterán a velmi talentovaný odstřelovač. Tajná služba ho požádá, aby se vrátil do akce a asistoval jim při zabránění plánovaného atentátu na amerického prezidenta. Bob Lee souhlasí, ovšem celý zásah dopadne katastroficky. Nejenže je prezident skutečně zavražděn, z atentátu je obviněn samotný Bob Lee, na kterého vraždu nastražili skuteční viníci. Bob Lee se vydává na útěk a snaží se dokázat svou nevinu a najít ty, kteří za vraždou a jeho obviněním stojí.

When a secret police operation fails, sniper Lee Ho-yeung develops a personal grudge towards his co-worker Ko Chun-kin. Ho-yeung eventually decides to leave the police force and becomes the president of a firearms association, colluding with organized crime on the sky. Through abusing the trust of an unknowing detective and the trust of his girlfriend who still works with the police unit, Ho-yeung has secretly been working against Chun-kin, who has been kept in the dark the whole time. But when Chun-kin starts to suspect the clues within multiple murder cases, a tense standoff between the brothers unfolds.

Set in a different Tokyo on a different world than ours, the story follows Tokunana, a unit of assembled misfits in the Metropolitan Police Department. Tokunana battles against "Nine" — an organization commiting crimes in their zealous worship of the dragons that once roamed the world.