Nangong Yi, the second son of Nangong Xun, the chairman of Nangong Group, was said to not live to be 21 years old because he suffered from congenital heart disease. Due to physical reasons and various pressures, he chose to give up his childhood sweetheart Xiao Chen. He thought he would never be in love again, but a man named Ye Qi broke into his life. His care and companionship along the way made him gradually forget the fear of death. Just when he was about to give it a try for love, he unexpectedly discovered that all the beauty was just a well-designed scam, and he was just a pawn to be used. In despair, he was ready to leave this world silently. Ling Hai accidentally learned of his life experience and discovered that he was Nangong Yi's half-brother and had always been a tool for others' revenge. After he fully understood Ye Qian's feelings for Nangong Yi, he decided to help the two go back to the past and accompany Nangong Yi through the difficulties. And after Xiao Chen knows the real reason why Nangong Yi rejected him, will he give up now to pursue his deep love? Will Nangong Yi forgive Ye Qian's deception and accept him again? Can the rumor that he will not live until the age of twenty-one be broken...