Digimon Adventure 02 (デジモンアドベンチャー 02, Dejimon Adobenchā Zero Tsū?), also commonly written as Digimon 02/Digimon Zero Two, is a direct sequel to the previous season; three years later. With most of the original characters now in high school, the Digital World was supposedly secure and peaceful. However, a new evil has appeared in the form of the Digimon Emperor (Digimon Kaiser). This new villain is different - he’s a human just like the DigiDestined. The Digimon Emperor has been enslaving all Digimon in sight with Black Rings and Control Spires and, to make things worse, has somehow made regular Digivolution impossible. Three new children are chosen to save the Digital World and, along with T.K and Kari, make up the new generation of DigiDestined.