A school festival is going to be held at T.A. Girls' Academy, which Rei attends. When Usagi and Ami go to check up on her, they find Rei busy overseeing the setup and events.
Usagi goes to a virtual reality arcade that has just opened up in the Juban District, where she unexpectedly runs into Mamoru, as well as Seijuro and Natsumi.
Usagi, Mako, and Ami see a boy being attacked by one of Ail and An's Cardian monsters. To Mako's surprise, the boy turns out to be her childhood friend Shinozaki.
Two months have passed since the Sailor Guardians defeated the Dark Kingdom. Having lost all memory of being Sailor Moon, Usagi now lives her life as an ordinary girl.
Sailor Moon confronts Queen Beryl's Endymion. She attempts to free Endymion from Queen Beryl's control, but his brainwashing cannot be undone. With the fate of the world hanging in the balance, Sailor Moon is forced to fight the man she loves.
The Sailor Guardians head out into the Arctic Circle. Having anticipated their arrival, Queen Beryl sends the DD Girls, who ambush them. To Sailor Moon's horror, the Sailor Guardians fall one after another as they try to defeat the DD Girls.
Sailor Venus finds the Dark Kingdom's hideout. The Sailor Guardians fall into Kunzite's trap, which hurls them into the past. The girls find themselves in a world called Silver Millennium, where they meet Queen Serenity, the mother from Usagi's past life.
Sailor Moon and the other Sailor Guardians appear to have a falling-out. But it's all part of the plan to locate the enemy's hideout. Also, a nosy journalist named Nana Asahina, who they suspect is a monster, approaches them.
Minako receives a surprise visit from Katarina, an Interpol officer from the UK and Minako's former partner while crime fighting as Sailor V. The two solved many cases together until a tragic incident forced them to go their separate ways.
The Dark Kingdom is trying again to revive the Seven Great Monsters. With five of them already under enemy control, Sailor Mercury and Jupiter scramble to protect Ryo Urawa, while Moon, Mars and Venus stay behind at Hikawa Shrine to protect Grandpa Hino.
Usagi goes on a family vacation to the hot springs, where she is unexpectedly reunited with Mamoru. But due to the Dark Kingdom's brainwashing, Mamoru no longer remembers Usagi or even who he really is.
Olympic figure-skating gold medalists Janelyn & Misha offer to coach groups of five girls. Usagi and her friends decide to investigate. Makoto, a master skater, gracefully glides across the ice and soon begins to receive personal lessons from Misha.
Usagi and her friends go to a ski resort to participate in the Moon Princess Contest, unaware that it's part of Kunzite's plan to eliminate the real Moon Princess. During the ski contest, Usagi and Rei end up falling for the trap.
Usagi decides to take the Princess Seminar course at Rose Mansion to become more princess-like, and the other Sailor Guardians join her. But unbeknownst to them, this seminar is actually a trap set up by the Dark Kingdom to find Sailor Moon.
Nephrite uncovers Sailor Moon's true identity as Usagi Tsukino. But his attempt to finish her off is cut short when he learns that Naru has been kidnapped by Zoisite, who demands that Nephrite give up his Dark Crystal in exchange for the girl's safety.
Naru has fallen in love with Masato Sanjoin. Knowing that Sanjoin is really Nephrite, Usagi tries to convince Naru to give up on her feelings without having her learn the truth.
The Kingdom of Diamonds is hosting a party at the embassy to reveal their royal treasure to the world. Believing that the treasure may be the Legendary Silver Crystal, both the Sailor Guardians and the Dark Kingdom crash the party to find out.
Ami spots Nephrite on the street and follows him down to an animation studio that is making the upcoming Sailor V movie. Suspecting that Nephrite is up to no good, Ami calls Usagi and Rei so they can investigate the studio.
It's summertime, and the girls search for a vacation spot so they can get away and focus on training. Instead of finding a beautiful beach destination, they settle on an ominous-looking mansion that has a very eerie service staff.
Usagi receives a love letter from Tuxedo Mask, stating that he'd like to meet her. But she soon finds out that all the girls in town received the same letter, including Naru, who believes that Tuxedo Mask is Masato Sanjoin.