Park Shin Hye is The Priestess of the Han River, or specifically the renowned Fire Seer, one who can see the future through the power of flames. But she is cursed as her skin horrendously burns anyone who touches her, and so she is locked in isolation in her temple. Lee Jong Suk is a ruthless General in the Imperial Army capable of slaughtering an entire village. He is tasked with defending Korea from an Otherworld Enemy that threatens the extinction of mankind. He is gifted by the gods of having "Iron Skin" where nothing can pierce his skin, nor can anything penetrate his icy exterior and his heart. With no choice but to forcefully gain the help of The Priestess, he takes her as a spoil of war . Can the two join forces together when everything about them clashes?

Set in the magical past of Joseon Dynasty, join these two in their adventures on their quest to save the country, and possibly the future of Man.