After the Great Earthquake, the world is razed to the ground. In the lone apartment complex left standing, survivors have established the Hwang Gung Market, where cash is dead and canned food is the new currency. Everything, from fuel to intelligence, is traded here. Park Sang-yong, the President of the Merchants, rules the market with an iron fist, forcing people to find their own ways to survive under his absolute order. But the status quo is shattered when a mysterious girl, He-ro, sneaks in to steal canned food. After discovering Sang-yong's fatal secret, she proposes a treacherous deal to his right-hand man, Tae-jin. As the Market's solid order begins to crack, alliance and betrayal become mere choices for survival. Who will endure to emerge as the master of the Market?