An entity called Pharaoh 90 which plans to overtake the Earth instructs a woman named Kaolinite to destroy the "powers of light" that can bring him to ruin.
A news report airs concerning students being transformed into monsters in a process called "Reversion" .
Usagi and her friends meet a famed race car driver named Haruka Tenou, while Mamoru encounters a prominent violinist named Michiru Kaiou. Makoto and Minako recognize their school uniforms from the prestigious Mugen Academy, a school for elite students. Suddenly, another student from Mugen Academy is transformed into a monster in front of the Sailor Senshi. Haruka and Michiru can be seen observing from afar.
After gathering at their Headquarters, Usagi and her friends learn that all the victims so far have been students from Mugen Academy and decide to investigate the school.