In the Joseon Dynasty period (AD 1600-1700), young Gyeom witness the murder of his father. Time passes by Gyeom is raised by the most talented thief in the region named Yong. He is growing up to be a decent young lad. Soon after witnessing his sister's death, he decides to track down those responsible for the death of his family and seek bloody vengeance. His one and only clue is the sword had been seared into his memory and with nothing but thaht image in mind ; he immediately begins his search by robbing rich officials. Thus, Il-Ji-Mae is born. Every night, high class mansions are emptied one by one and a cherry blossom was painted on the wall as mark. It resembles the work of an invisible spirit. Meanwhile, royal palace prosecutor Shi-hoo become obsesses with catching Il-Ji-Mae, King In-jo felt threaten by the growing reputation of Il-Ji-Mae as the king of the commoners and wanted him be captured.