"Faith" depicts the love between a warrior from the Goryeo Period and a female doctor from the present day, their love transcending time and space.  ......  King Gongmin (Ryu Deok-Hwan), who was held as a hostage in Yuan (China) for an extended period of time, becomes the King of Goryeo (Korea). He married Princess Nogoog (Park Se-Young), who is the Princess of Yuan. Choi Young (Lee Min-Ho) and his men escort King Gongmin and Princess Nogoog from Yuan to Goryeo.  On the way to Goryeo, the group stays at an inn. Assassins then break into the inn and attack their group. During the struggle, Princess Nogoog's neck is slashed by an assassin's sword. Jang Bin (Phillip Lee), who is the most renown doctor in Goryeo, states that he can't save her. If Princess Nogoog dies, Yuan will takeover Goryeo completely. King Gongmin's vassal asks King Gongmin to go pray on a mountain near a mystical source of light. When they get there, they see the mysterious lights swirling around like an entrance to a vacuum. King Gongmin's vassal tells the King that the swirling lights is actually a portal where they can retrieve a great doctor from the heavens. King Gongmin then tasks Choi Young to enter the portal and retrieve the great doctor.  After entering the mystical swirling lights, Choi Young finds himself beneath a statute at a temple. When he leaves the grounds of the temple, Choi Young is confused by the strange sights. He sees modern buildings, contemporary people and automobiles. Choi Young goes back to the temple, which is actually a traditional village area in the middle of present day Seoul, and spots a monk walking by. Choi Young asks the monk where he can find the great doctor. The monk tells Choi Young that at the nearby COEX building, where a medical convention is taking place, he can find the best doctors there.  Choi Young makes his way to the COEX building and walks into the medical convention area. He then enters a seminar room and sees a woman speaking to a large auWatch drama online for free.