Chibi-Usa wanders into Tomoe Research Laboratory, where she finds a girl who appears to be sick. Chibi-Usa is trying to help her when a monster suddenly appears and attacks the girls.

Usagi and her friends discuss the two mysterious figures they saw, people who strangely look like Sailor Guardians. Luna and Artemis warn the girls to be careful, as they are still unsure whether these two are friend or foe.

The Sailor Guardians defeat Eudial but allow the mysterious Guardian to escape. Still suspicious about Mugen Academy, the girls decide to survey the school once again by attending Michiru Kaioh’s violin recital which is being held on campus.

The Sailor Guardians learn that Haruka and Michiru are Sailor Uranus and Sailor Neptune. However, the two do not appear to be interested in working with the other Sailor Guardians.

The Sailor Guardians must stop a plant called Tellu from stealing the Hostes from humans. Meanwhile, a college student named Setsuna Meioh is investigating the Sankakusu Delta, but she too falls victim to the Tellu plant.

Sailor Uranus, Neptune and Pluto appear before Sailor Moon and the other Guardians to reveal their true agenda. Learning what’s at stake, Sailor Moon and the others offer their help but are rejected by Uranus, causing further tensions...

Cyprine and Ptilol of the Witches 5 have placed the Sailor Guardians under a spell that causes them to turn against one another. The battle continues to escalate, when suddenly the three Talismans react to Sailor Moon’s strong desire to stop this fight.

With Chibiusa on the verge of death, and Hotaru being completely taken over by the enemy, Sailor Uranus, Sailor Neptune and Sailor Pluto part from the group to annihilate Mistress 9 once and for all, even it means destroying both Hotaru and the spirit of Sailor Saturn in the process.

With the eight Sailor Guardians working together, Mistress 9 is more determined to bring her beloved master to Earth by utilizing the vast powers of the Silver Crystal she now possesses. However, Hotaru's consciousness lives on and will not let her do as she pleases. With time running out, Super Sailor Moon is ready to do whatever it takes to save Chibiusa, Hotaru and the spirit of Sailor Saturn lying dormant within Hotaru as best she can.

Now that Professor Tomoe and Kaorinite have been destroyed, it is up to the eight Sailor Guardians to confront Mistress 9 directly and eradicate her once and for all. As Pharaoh 90's complete vesselization looms nearer, Hotaru's consciousness is determined to do whatever she possibly can to save Chibiusa and stop Mistress 9 from using her body for evil ends.

Super Sailor Moon and everyone else continue to fight with their memories of Hotaru in their hearts. All attempts to obliterate Pharaoh 90 have failed and the world seems lost, until the awakening and return of a certain person comes to turn things around...for better or worse.

Now that Sailor Saturn has awakened, she has unleashed her strongest and most destructive attack yet and has swung down her Silence Glaive, putting an end to Pharaoh 90 and the whole world itself in the process. But all is not yet lost.