Great Britain has MI6, Country M has the CIA, and Country Xia has the Dragon Group, who are known as the mysterious force of the East. When a top soldier who was eliminated and admitted appeared on the dragon group's list again, no one noticed that this inconspicuous guy was the most difficult dragon king in the entire dragon group! Mercenary: "Report, our secret team was attacked and suffered heavy losses." Command: "How many enemy troops are there?" Mercenary: "Just... one person! He is holding a clown's playing card in his hand. "Command: "What? Retreat quickly!"