In the school known as KO One, all the delinquents and misfits from other high schools are sent there and there is a ranking system for the students that is strictly respected. With the leader of the students, Wang Da Dong (Jiro Wang), back in his own time period, the KO ranking has been safely restored and his friends are back where they belong. Da Dong becomes a member of the inter-dimensional guards. But when sudden spikes in fighting power again disrupt the KO ranking of the class, Da Dong decides to go undercover to investigate. But he is disguised as a 28-year-old dropout who returns to finish high school. As Da Dong tries to restore order to KO One, he clashes with the new class leader, King (Pets Tseng). Who will emerge victorious? “KO One Re-Act” is the third season of the popular “KO One” drama series that originally aired in 2005. “KO One Return” is the second season that aired in 2012.