Faith (2012) (K-drama) Complete

After King Gongmin of Goryeo marries the Yuan princess Noguk, they return to Goryeo. On the way they are attacked and the queen is fatally injured. According to the advice of his soothsayers, the king orders royal bodyguard Choi Young to pass through a mystical portal ("heaven's gate") and find "heaven's doctor." Choi Young travels to the future and brings back Yoo Eun-soo, a modern-day doctor from Seoul, who saves the queen's life. He makes a promise that he will return her to her world, but the kind-hearted yet powerless King Gongmin forces Eun-soo to stay as she can be useful to him.

As Eun-soo accustoms herself to her new surroundings, gradually she and Choi Young fall in love with each other. But problems arise as others become fascinated with her strangeness and apparent ability to predict the future, and Eun-soo becomes a pawn in the political power plays between Gongmin, the Yuan overlords, and the sociopathic nobleman Ki Chul. Constantly risking his life, Choi Young thwarts numerous attempts by Ki Chul to kidnap and possess Eun-soo, the worst of which almost results in the death of the king and queen.

Choi Young unselfishly brings Eun-soo to the portal before it closes, but before Eun-soo can tell him that she's decided to stay, Ki Chul's soldiers attack them and Choi Young is mortally injured. Eun-soo enters the portal, hoping to save him by gathering medical supplies from the future. But when she passes through, she finds herself in the era a hundred years before Choi Young's time. There, she spends lonely years waiting for the portal to open again, while leaving hints for her future self. One day, "heaven's gate" opens again and Eun-soo finds herself back in modern-day Seoul. But she finds life empty without Choi Young, and she re-enters the portal. Eun-soo reaches the time period five years after she left him, and finally she and Choi Young find each other again.

Main Cast
Lee Min Ho as Choi Young
Kim Hee Sun as Yoo Eun Soo
Yoo Oh Sung as Gi Cheol
Lee Philip as Jang Bin
Ryu Duk Hwan as King Gong Min
Park Se Young as Princess Nogook
Sung Hoon as Chun Eum Ja
Shin Eun Jung as Hwa Soo In
Lee Byung Joon as Jo Il Sin
Baek Gwang Doo (백광두) as Baek Choong Suk
Kim Jong Moon (김종문) as Oh Dae Man
Jung Yoo Chan (정유찬) as Joo Suk
Kang Chang Mook (강창묵) as Deol Bae
Yoon Kyun Sang (윤균상) as Deok Man
Kim Soo Yun as Deo Gi
Kim Mi Kyung as Court lady Choi
Kwon Min as Ahn Do Chi