Tennis prodigy Shen Chuning is preparing for an upcoming tournament. Her older sister, Shen Nanzhi, discovers in advance that her boyfriend, Fu Xingzhi, plans to drug Chuning and frame her for doping so that his beloved, Su Yingxue, can steal her spot in the competition. Nanzhi gathers evidence and takes precautions, but the sisters accidentally drink the drugged water themselves. During the drug test, an insider, Ma Lan, switches the samples and plants a banned substance. Fu Xingzhi seizes the opportunity to stir up public suspicion. Despite feeling unwell, Shen Nanzhi presents the evidence. Ma Lan confesses on the spot, while a recording proves that Su Yingxue was the mastermind. Meanwhile, He Mingchuan's Ding Sheng Sports manipulates the data and launches an online smear campaign to suppress Shen Chuning. United as sisters, they expose the dark secrets of the sports world and embark on a brand-new journey.