An epic melodrama about the problems and experiences of Choi Kang Chi, who was born a-half-human half mythical creature, and his struggle to find the Book of Family Gu and so live like a human being.
Choi Kang Chi was raised by the Choi family, after being picked up in the river. In the drama, Choi Kang Chi is the son of Gu Wol Ryung, the guardian spirit of the Jiri Mountain, and Seo Hwa, his human mother. Kang Chi is someone open, full of curiosity and has a great heart which stand out for their nobility and loyalty, it realizes that it is mythical creature half human-half, through a certain incident and start living his second life .
Meanwhile, Dam Yeo Wool is an expert in martial arts and archery. It is an honest person who really values the three links and five relationships in Confucianism, and became an instructor of a martial arts center at a young age.
What happens when Jung So, a monk who predicts the future, warn them that the two of them could die if they continue their destination together?