In the blink of an eye, Cheol-soo (played by Jeon Kwang-yeol) and Young-hee (played by Lee Mi-sook) have been married for ten years. In the past ten years, although the tranquility and peace of yesterday have been repeated every day, Cheol-soo and Young-hee love each other deeply, and both feel very happy. However, one day, bad luck befalls the family, Cheol-soo loses his job, and what's worse, he takes on a huge debt on behalf of his friend, which he cannot pay at all. In order to protect his wife and children, Chul-soo made a last resort. Over there, the series of bad news completely shattered Yingji's fantasy about the future. She almost lost everything, but the only thing that didn't change was her love for her husband. By chance, Young-hee reunites with her former suitor, Han Ji-hoon (Chao Ming-gu), who has now become a well-known entrepreneur. The appearance of Han Zhixun gave Yingji a glimmer of hope, and in order to protect her family, the first thing she had to do was to betray her marriage.