Eun-ah led a perfect life with her family before THE ONE breaks into their life, and kills her husband and daughter in front of her. Barely escaping from death, Eun-ah becomes a handicapped in a wheelchair. She tries to find THE ONE but her immobile body is an obstacle. She lures people who need organ transplants for their family, promising to give her organ after taking her revenge. The fives find the critical clue and nearly get him. But THE ONE’s unexpected plot threatens her revenge plan and the whole five members.