Cheerful jumping music, youthful and sunny young baseball players are printed in the audience's eyes, and the piano music is slightly sad. These young teenagers appear in the dim picture, which immediately fills the audience's heart with gloom. This is their memories of youth. Du Peng is a good boy with excellent grades. There are many awards, certificates and trophies at home, and even dreamed of winning the Nobel Prize in Physics. Once, he saw his father having an affair and couldn't accept it. Later, when he heard his parents quarreling, his mother planned to send him abroad to study and decided to divorce his father. Du Peng began to play truant. He and Yuan Shao, who were shrouded in the shadow of his father's violence, Chen Zhi, who lived alone with his grandmother, and Xu Feng, who had a weak personality, went to the Internet cafe to play games crazily. In the game, four boys found their own needs respectively. Playing in the internet cafe for a few days, eating in the internet cafe, sleeping in the internet cafe ... drug addiction led them to commit crimes. In the process of committing the crime, Du Peng hurt the security guard unintentionally, but these children didn't realize the seriousness of their behavior. Although Mr. Hu tried hard to communicate with them, the teacher's work was in vain every time because of mistakes. Chen Zhi was the first person to know the serious consequences of this incident. He can't stand it. He's crazy. When Du Peng learned that the man who was accidentally injured by them that day was his nanny's husband, he chose to die. After Mr Hu's home visit, Yuan Shao made up his mind to be a good boy. He had the first real communication with his parents. Just as the family was happy, the police came. Yuan Shao's parents have been chasing the police car, and his heart is full of regret. Xu Feng was not punished for stopping the crime, but his heart was full of confusion. Finally, Mr. Hu and others helped Xu Feng return to the right path.