90 Days, Time to Love is a Korean drama series that follows the life of Hyeon Ji-seok (Kang Ji-hwan). During high school, Hyeon Ji-seok discovers that his girlfriend, Ko Mi-yeon (Kim Ha Neul) is also his cousin, and with this knowledge, they decide that the best course of action would be to break up. After a chance encounter in Seoul, they discover that their feelings for one another have not changed, and make plans to run away to America together. Learning of their plans, Hyeon Ji-seok's father commits suicide, which forces his son to stay in the country and abandon his high school sweetheart yet again. Hyeon Ji-seok goes on to marry and have a daughter with his father's business competitor, although it is loveless. After learning that he has a terminal illness and only 90 days to live, he searches for Ko Mi-yeon, his one true love, wishing to spend his last days with her.