Sunoo has spent his life under the shadow of his uncle, a man consumed by alcoholism and gambling. When his uncle's luck finally runs dry, he leaves behind a staggering debt of 5 billion won to the Hexad, a ruthless six-man mafia syndicate that governs the city's underworld. Faced with a debt he cannot pay, his uncle chooses cowardice and vanishes. With their primary debtor gone, the Hexad turns their predatory gaze toward the only asset left: Sunoo.