"The Third One" tells about love, the sweetness that comes with the hardships that every couple has experienced. The film opens with a romantic love story between painter Quang Kha (Han Jae Suk) and doctor Thien Di (Ly Nha Ky). However, just when happiness was budding, an unexpected event struck. A serious, life-threatening traffic accident happened, at the same time the line "love and death always go together" sounded. The story becomes more and more dramatic when Quang Kha wants to go back in time to save his wife. At the same time, a new character takes on an important role, but it is not clear whether good or evil will support him to carry out the above plan.