A melodrama epic about the great deal of trouble Choi Kang Chi (Lee Seung Ki), born as a half-human-half-mythical-creature, who goes through in order to become human and a story of Choi Kang Chi’s journey of struggling in order to live more like a human than anyone else despite not being able to become human.

Yoon Seo Hwa (Lee Yeon Hee ) and the guardian god of Jiri mountains, Gu Wal Ryung (Choi Jin Hyuk) fell in love but due to the trap of their enemies, the Yoon family status fell into ruins. While Seo Hwa was on the run with her maid, she received news that Wal Ryung had disappeared after a mishap. Feeling unable to raise her son while escaping, she sent him down the river in a basket hoping that someone could take him in.

Choi Kang Chi (Lee Seung Ki) was raised by the Choi family after having been picked up from the river. Meanwhile, Dam Yeo Wool (Bae Suzy) is a master of martial arts and archery. Yeo Wool is an upright character who really values the Three Bonds and Five Relationships in Confucianism, and becomes an instructor at a martial arts center at a young age.