The protagonist is Lin Yu, who was born in an ordinary but hopeful family. During the college entrance examination, due to long-term indulgence and self-wasting, Lin Yu unexpectedly failed the exam and became a loser in the eyes of others. In that lost summer, his beloved girl Su Yao also chose to leave because of his ignorance. Faced with family disappointment and the loss of love, Lin Yu fell into deep despair. However, an accident gave Lin Yu a chance to be reborn and returned to the eve of the college entrance examination. This time, he was determined to change himself and fight back from a scumbag to a top student. In the process of studying hard, he made like-minded friends and encountered jealousy and frame-up by his competitors. At the same time, his relationship with Su Yao is also undergoing many tests in this complicated process. In the end, Lin Yu relied on his firm belief and unremitting efforts to achieve excellent results in the college entrance examination. Not only did he gain academic success, he also won back Su Yao's heart and started a glorious life.