Lin Xiruo, a patient with congenital heart disease, lost her memory after undergoing a heart transplant. In the heart donor ward, she accidentally saw the diary left by the donor. The diary records how the donor Yi Shen fell in love with her.
After her rebirth, she looked at the yellowed diary over and over again, and unknowingly fell in love with the old friend who saved her. From then on, she lived in an imaginary world and lived a busy life.
When she reached the age to get married, during the blind date arranged by her aunt, she originally thought about getting married and having children with the good-looking prosecutor who said she fell in love with her at first sight, forgetting the diary, forgetting the distant man who gave her life, and starting a new life.
However, an old photo accidentally revealed a series of unknown secrets, breaking Lin Xiruo's original peaceful life.