Xiuzhen (Sun Yizhen) is a rich girl who runs away from her boyfriend but is abandoned and meets Chul-soo (Zheng Yucheng), who works as a worker in a construction company in a convenience store. In the days to come, they met again and again and finally fell in love with each other. Zhe-soo knows that his identity is very different from that of Xiuzhen, so he dares not easily express his friendship. Xiuzhen proposes to Zhe-soo. Even if Xiuzhen's parents stop them, their love power still persuades their parents. Married life is sweet, Xiuzhen also helped repair the relationship between Chul-soo and his mother. But the good times didn't last long. Xiuzhen's memory began to decline day by day. She got Alzheimer's disease and her brain was gradually dying. The illness deeply afflicted the two people who loved each other. Xiu really forgot everything completely one day, but Chul-soo could not leave Xiuzhen from then on. Can their love help them overcome the test of memory?