Lin Mu and Su Cheng were childhood sweethearts, but they separated when they were young. Su Cheng found Lin Mu in high school, but they fell in love but ended up not being together. The most painful thing in life is separation. Reluctant to leave Lin Mu and return to her childhood, she vowed never to leave him alone again in this life, and she would always be by his side. From the headquarters to the university, Lin Mu is present everywhere in Sioux City. Lin Mu knew that her rebirth was for Su Cheng.