One the driven top student and the other a happy-go-lucky troublemaker, Jang-il (Siwan) and Sun-woo (Lee Hyun-woo) become unlikely buddies in high school, both poor but proud in their own ways. Their fathers both have ties to a powerful businessman who orders Jang-il's father to kill Sun-woo's father. One desperate crime begets another, and the boys' friendship derails in a shocking betrayal. The attack leaves Sun-woo blind and in a coma. Thirteen years later, their fates will come to a head when they meet again as adults. Jang-il (Lee Joon-hyuk) has become a prosecutor haunted by his past, while Sun-woo (Uhm Tae-woong), the young CEO of investment trust company Royal Tree, is plotting his revenge. Their fates are intertwined with the women they love-Ji-won (Lee Bo-young), a volunteer reader for visually impaired people who now works as a VIP party planner at a five-star hotel, and Soo-mi (Im Jung-eun), a hyper-realism painter. As Jang-il and Sun-woo vow to destroy each other, the truth unravels in a harrowing cycle of deception and revenge as the crimes and secrets of yesteryear come to light Jeon Woo Chi based on classical novel of unknown origin dating to the Joseon era that tells the story of a free-wheeling, mischievous Jeon Woo Chi, who swallowed the gumiho's fox bead, which gave him powers of Taoist magic. He uses those powers to save the poor, oppressed people and becomes a hero.