It tells the story of Liangcheng's changing destiny after his rebirth. After Liangcheng was pierced through the chest by a steel bar while protecting a co-worker at a construction site, he returned to his 17-year-old high school days. Determined to change the past, he first behaved actively in math class, interacted with Jingya, and tried to change her destiny. At the same time, he also began to care about his father Liang'an and tried to improve their family relationship. The story is full of drama and emotional conflict, showing Liangcheng's growth and changes after his rebirth.
