At a difficult place in his marriage and career, a middle-aged man gets a shot at a do-over when he's transformed back into his 18-year-old body.

Two 19 year old girls were brutally murdered. The bodies were abandoned and could not be found anywhere inside the warehouse scattered with blood. The only suspect, was their friend. He was drunk on the night of the incident. He doesn’t recall a single memory. No memories of committing a murder. No memories of not committing a murder either. The boy had become a young adult by the time he was released from prison in 11 years. He wished to pursue a quiet life… But another murder flips the village. A white bone carcass has been discovered. The real devil is hiding somewhere within the seemingly peaceful village. Who’s the real devil?

In a world of folklore and mysticism, a vengeful spirit and a devoted shaman cross paths, sparking a journey of love and redemption.

Born from a tryst between a nobleman and a slave woman, Hong Eun Jo is no stranger to the plight of the average person, especially after her father fell ill. By day, Eun Jo works as a doctors, but by night, she assumes the identity of "Hong Gil Dong," a thief who steals from corrupt officials to spread wealth among those in need. Hong Gil Dong's antics attract the attention of Prince Yi Yeol, who has a penchant for investigations and is personally intrigued by the mystery of the righteous thief, although most palace officials believe that he's just joking around. Amidst his search, Yi Yeol runs into Eun Jo, falling in love at first sight – but when Yi Yeol and Eun Jo happen to swap bodies, secrets they both try to keep hidden risk getting out.