In the animated series inspired by 'The Powerpuff Girls,' Professor Utonium and his son Ken experiment with Chemical X, which unexpectedly morphs into Chemical Z after a mochi cake mishap. When Ken inadvertently shoots a beam of Chemical Z at a glacier in Tokyo Bay, it triggers a peculiar phenomenon. Mysterious black and white lights disperse from the impact, where the black lights mutate individuals into monstrous beings, exemplified by a zoo monkey transforming into the notorious Mojo Jojo. On the other hand, the white lights target three ordinary girls—Momoko, Miyako, and Kaoru—granting them the ability to metamorphose into the superhero trio known as the Powerpuff Girls Z!