Sunyoung, the final member of his clan which was massacred in the middle of the night seemingly out of nowhere, swears to get revenge on those responsible. With the ability to create clones of himself through the help of "Zero", an alien who traveled back to the past from thousands of years in the future, he devises a plan to split himself into multiple people. Each of them slowly creates a name for themselves, gaining influence, and becoming legends in their own right. An example of a few identities he adopts are "Changmin" the Crazy Monk, "Jack" the Reaper, and "Yoshimoto Sora" the Black Swordsman from the East. But none of these identities are more vital to his plan for revenge than the main two: Sunyoung, the imperial soldier making his way up the rank of the army belonging to the empire who was one of the parties he's sworn revenge upon.  And Moonjin, a stolen identity of a Demonic Cult prince who was so down the order of succession that he was practically not even a prince. Follow the legend of Sunyoung, the twin dragon, as he embarks on a journey to take revenge upon the clans, sects, and the imperial family as well as his rise to glory that left his name etched in the history books for eternity.