The collapse of the protective shield has brought the three time-spaces except the Golden Time-Space to the brink of collapse. The conflict broke out again between Gu Zhan (played by Luo Hongzheng) and Zhi Ge (played by Huang Weijin). The two agreed to have a fair competition. The winner will become the new boss of the Ultimate Class. However, when two tigers fight, one will be injured. Is tragedy inevitable? On the other side, Dadong (played by Wang Dongcheng) and Xia Tian are fighting against the powerful army of the demon world. They entrust Xiu to protect Lei Ting (played by Zeng Peici) to the Golden Time-Space. Who knew that the two encountered an enemy ambush on the way back and were separated. Lei Ting's whereabouts are unknown. Xiu, who blamed himself, decided to hide the bad news from Dadong first and try his best to make up for this serious mistake. He found everyone in the Ultimate Class, hoping that they could help him find Lei Ting within 72 hours.