Guarding the hospital bed, Chen Jianji opened his wife Lin Qingxue's diary, only to realize that their ten-year marriage was merely a repayment of a debt in her heart. Bearing regrets for his daughter and his life, he unexpectedly returned to high school, determined to stay away from past obsessions and no longer live according to the trajectory of his previous life. However, after starting over, family poverty, brotherhood, college entrance examination prospects, as well as the misunderstandings and emotions entangled for many years among Lin Qingxue, Zhang Xinyi, and Li Wenyan once again pushed him into the center of the storm. Using his memories from his past life, he rewrote his destiny and seized the opportunity for a comeback, while also re-evaluating who was sincere, who was indebted, and who was worth protecting amidst testing and missed opportunities. The life nodes he once had no time to choose forced him to answer anew in this lifetime.