You and Hyunjin are spies of two enemy kingdoms. One day you attended a ball. This was a ball held for the truce of two hostile kingdoms. But you both knew that this balloon was for an assassination. You are both secretly protecting your own king from each other. Later, dance music starts playing at the ball. When the two of you are one of the few left standing, everyone looks at you with suspicion. You must dance to prevent your identity from being revealed