In 1983, high school teacher Ji-hwan is attacked by a pickpocket. In 2015, homicide detective Gun-woo is shot during a chase and loses consciousness. Both men are taken to the same hospital in different time periods, and both their hearts stop and miraculously start again at the same time. A mysterious force binds them together, allowing them to see through each other’s lives in their dreams. Soon realizing that the women they love strikingly resembles each other and that they are in fatal danger, the two men must team up to trace the past and change her destiny.

Set in 1969 at the end of the Vietnam War, elite officer and war hero Colonel Kim Jin-pyeong is about to get promoted to general. He is a constant subject of jealousy, with the commander for a father-in-law and a beautiful wife. But in truth, his affection for his wife has subsided and he is suffering from post-traumatic stress disorder from the war. One day, Jin-pyeong encounters Ga-heun, the wife of one of his captains, and falls into a fatal and obsessive love affair that forces him to give up everything he had achieved.

Based on an original web-toon, a woman gives up her organs for guarantee and takes revenge on a serial killer who killed her family. After losing her family in front of her eyes, Eun-ah plans the revenge to THE ONE who killed her family. She lures people who need organ transplant promising them to give her organs after taking her revenge.