Set in a fictional country called Daeho, the series is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the “alchemy of souls”, which allows souls to switch bodies.^[10][17][18]

It follows the story of an elite warrior named Nak-su whose soul is accidentally trapped inside the weak body of Mu-deok. She becomes entangled with Jang Uk who is from a noble family, becomes his servant and master, and teaches Uk her skills as they both fall in love with each other.^[3][13][18]