A melodrama about a man and a woman who are each other’s first loves, but get separated when they were teenagers due to a painful family situation and meet again 12 years later. Yoon Soo Wan (Goo Hye Sun) is a legally blind woman who gets her vision back after receiving corneas transplantation in an operation and decides to embrace life with passion by becoming an emergency rescue worker who is known not only by the fire department but also by the local hospital. She is a tomboyish character who still fondly remembers her first love from 12 years ago. Park Dong Joo (Lee Sang Yoon) is a surgeon and Soo Wan's first love who was an outstanding student and knows how to comfort one who is in pain. He is proud of his father and dreams of being a firefighter like him. He goes through various changes in his life and has to change his fate due to many happenings. He is a man who only watches over his loving woman from the side and overcomes the misfortunes ahead of him.