Satan (마왕)

For the sake of his parents, who became ill after hunting a tiger, Choi Hyeon went to the mountains in search of the sacred guardian tree. Upon finding the sacred tree, a mysterious man named Tak Myeong appeared before him. In return for helping his parents recover, Tak Myeong asks Choi Hyeon to visit him in the mountains for a hundred days. But, will Choi Hyeon be able to repay Tak Myeong’s kindess(?)?