Whose youth is not confused, whose youth is free from pain. This is the first "Youth Dance" in the "Youth Pain" series. On the eve of the national college cheerleading dance regional finals, Ran Xiaomin, the C-position lead dancer of W University, suddenly broke her leg and withdrew from the finals she had been waiting for. Captain Yao Lan did not want to show up to compete, so her biggest competitor Wu Jierui replaced her as the lead dancer and won the championship. The school's detective Mi Yuying discovered the truth after solving one mystery after another. The ideals and love that Ran Xiaomin, Wu Jierui, and Yao Lan spent their youth and lives pursuing are so fragile and powerless in the face of the cruel reality.