"Whoever gets in my way dies!" One day, Dae Do-Oh appeared on the battleground between the Iron Flag Alliance and the Nine Dragon’s Cult. He is the captain of the Joker Squad, a sub-unit of the Iron Flag Alliance’s Black Flag Hall. Contrary to their name, the Joker Squad accumulated many accomplishments on the battlefield. At the same time, unknown enemies are plotting against both the Iron Flag Alliance and the Nine Dragon’s Cult. What will happen next? What will Dae Do-Oh do? The battle for survival begins now!