When promising young stage actress Kang Jung Hwa and brilliant neurosurgeon Dr. Min Ki Beom meet by chance on the subway, a whirlwind series of events are set in motion. Soon after, Jung Hwa mysteriously collapses and begins to experience memories from previous lives. At the suggestion of her boyfriend Min Ki Soo, she begins undergoing hypnosis treatment for insomnia by psychologist Lee Soo Hyeon. What she doesn't realize is that their lives are all intertwined—Dr. Min is her boyfriend's brother and her psychologist's fiancée. When she delves into her past memories, she discovers a bittersweet, terrifying truth—that the four of them have always had intertwining fates throughout their past lives. Can she discover why they're all are continuously reborn only to be drawn together again, even while she tries to fight the powerful attraction between herself and Dr. Min? Jang Shin Young (The Road Home), Ryu Soo Young (Bad Couple) and Lee Jong Soo (Yi San) headline this bittersweet story of fate and destiny.