A Korean Odyssey (Korean: 화유기; RR: Hwayugi) is a South Korean fantasy television series starring Lee Seung-gi, Cha Seung-won, Oh Yeon-seo, Lee Hong-gi and Jang Gwang. Written by the Hong sisters, the drama is a modern spin-off of the Chinese classic novel Journey to the West.
In 2017, Son Oh-gong (Sun Wukong) and Ma-wang Bull Demon King) are in conflict with each other as they look for a true light in a dark world where evil thrives. From there, Son Oh-gong is bound to his protective role towards Seon-mi (Sanzang), the little girl he had met years ago. Having made a contract with Seon-mi 25 years ago, entitling her to seek help from Son Oh-gong whenever she calls him in exchange for letting him free, the two meet again in a fateful encounter.
Seon-mi is a young girl born with the ability to see ghosts and spirits. Her seemingly irrational behavior has isolated her from her family and peers, and her only protection is her grandmother and a small yellow umbrella with protection spells written by a Buddhist monk. One day when she walks home from school, a ghost follows her, and this is witnessed by a mysterious man in a suit and black top hat (Woo Ma-wang). The mysterious man exorcises the ghost for her, and asks her for a favor: to enter a magical house and retrieve a certain fan. She is also given specific instructions to ignore anyone she sees in there. However, the person inside the house is Son Oh-gong, the Monkey King, who was imprisoned inside by Heaven for his crimes. He blocks her path and forces her to acknowledge him, and tells her that the man outside is a great danger to her as well. Oh-gong makes her a deal: if she puts out the five candles on the table and frees him, he promises to protect her from all dangers in her life every time she calls his name. But after she agrees and releases him, Oh-gong steals the memory of his name out of her head and makes a run for it, leaving young Seon-mi stranded in the middle of nowhere.