Shadowless In ancient Korea, the prince of Beahae has been assassinated and the kingdom is in turmoil. The only hope lies with so-ha, a beautiful but deadly female warrior who is sent to find prince Jeong and place him on the throne after years of exile. The killer blade army has other ideas, dispatching a host of fighters to stop So-ha including the icy female assassin Mae.
The movie begins at the quarters of Balhae Crown Prince Dae Soo-Hyun. A battle ensues as the Balhae Imperial guard and the KBA fight off. Gun appears and sees that Mae and the KBA soldiers took care of the Imperial guard. Gun and Mae enter the Crown Prince's quarters. Suddenly, the captain of the Imperial guard enters the room to protect the Crown Prince, but is killed by Mae. Gun asks the Crown Prince and gives him one more chance to surrender to the Dongdan Kingdom, but the Crown Prince refuses. He unsheathes his 'Mooyonggum' (shadowless sword), and charges at Gun, but Gun uses a military technique on the Crown Prince from below. The Crown Prince is shown lying down on a bloody floor with his sword out of his hand...