The former debate powerhouse Dongfang University of Finance and Economics merged with the equally strong Beijing Jiaotong University. The first team of Dongfang University of Finance and Economics, where Xiaoyu, Nanbei, Tao Hao, and Tuanzi are located, is facing a huge crisis of being replaced. They are replaced by Liu Yanze, to whom Tuanzi failed to confess his love, and Yin Nan, Xiaoyu's childhood enemy. Unwilling to become the second substitute team, they decided to challenge, but unfortunately lost. The members of the spare tire team went from "leaving it to fate" to "inspirational turnaround", gradually gaining fun in debate and consolidating friendship. Debate taught them a lot, and they really fell in love with debate. However, the school team was worried that the rapidly growing spare tire team would steal the limelight in the national competition, and began to make things difficult everywhere. Everyone fought their way through the national competition of their dreams, and finally met the school team's mortal enemy in the semi-finals. Faced with school pressure, collective honor and their own dreams, they have to make the most difficult choice of the year.