In a mafia-governed city where corruption and violence is commonplace, this manga follows two brothers who find a mysterious artifact that will change their lives forever

Joe and Zack lost their father when they were young. Since then, the two brothers have chosen vastly different paths: Zack is a policeman, while Joe is a food delivery boy. Yet despite their differences, both share a gift for boxing. However, the discovery of mysterious artifacts left by their late father is about to change their lives forever . . .

Can the two thrive against all odds, thrown into a sprawling metropolis commanded by corrupt mafia gangs?