What Kind of Doctor Is He?

Yeon Kyung and Dr. Heo are back in Hanyang, and they have to figure out what caused them to travel back through time. Dr. Heo returns to Haeminseo to figure out what has been going on while he was gone. Meanwhile, Yeon Kyung learns that Dr. Heo is not as honorable as he seems. While trying to find a way back to Seoul, Dr. Heo is chased by people who have grudges against him.