As she sleeps, Bunny dreams of Darien. Luna wakes her up, telling her to get ready for school. Bunny rises, once again noticing Darien's pocket-watch. After returning from the moon, it had stopped again. Luna reminds Bunny to bring along the Silver Imperium Crystal. Bunny leaves for school with Luna, and her parents notice that she's back to normal.

As they walk down the street, Bunny trips, dropping the pocket-watch. She looks up and sees someone who looks like...Darien. She tells herself that it can't be him, and picks up the watch, which as started to work again. She heads to school and Luna to the control room.

In front of the arcade, the brainwashed Darien approaches Andy and his friend. Andy assumes Darien is the new part-time worker at the arcade and then recognizes him as Bunny's friend. Andy tells his friend Endo to go on ahead, but as he leaves, Darien causes him to disappear and brainwashes Andy, assuming the idenity of "Endo", his best friend.

Later that day, Andy's friend Reika comes by and asks about the new guy. She is surprized when Andy says it's his best friend, "Endo", and she drops her book of semi-precious stones. "Endo" picks it up and looks at a page of Jadiete, Nephrite, Kunzite, and Blue Zoisite, commenting that he has those exact 4 stones himself.

After school, all the scouts go to where Amy lives, a penthouse downtown, to have a meeting. In the lobby, Mina drops the stone sword, scratching the marble floor. Amy explains that it's okay, since marble scratches easily. Amy brings out a diamond, the hardest substance in the world. Mina taps it with the stone sword, and the diamond shatters. Everyone is horrified, but Amy's okay with it since her mom "has loads of them". The stone of the sword is not normal, crumbling even the hardest substance known. Luna has also determined that it is very poisonous. A sword formed of hardened poisonous stone.

As they talk of their former lives, they notice Bunny has fallen asleep, from all the stress in her life. Lita picks Bunny up and puts her in bed. The scouts then look at the sword, realizing they do not know the method of sealing away the enemy when they find it.

Bunny wakes up later, remembering the time she woke in Darien's apartment. She decides to head to the arcade to play the Sailor V game. When she gets there, Bunny sees Andy and the brainwashed Darien at the Sailor V game. Andy introduces him to Bunny as his best friend Endo, a freshman at the same KO University as him. Bunny is entranced by him, even while telling herself he is not Darien. The warm seems the same, like Darien is there. But, the smile is cold.

Mina is alerted that someone is going through the Sailor V game at an incredible pace. The scouts enter the arcade and see Bunny with...Darien?! Luna recognizes him as the guy they passed that morning. Raye senses something and says they cannot let Bunny be with him.

The next day, Molly asks Bunny if she wants to walk home together. But, Bunny declines. Molly wonders what's up with Bunny and Melvin tells her Bunny has a crush on the new part-timer at the arcade.

Luna stops Bunny just outside the arcade, reminding her that "Endo" is not Darien. Bunny says she knows that, but does not really listen to what Luna is saying.

In the arcade, "Endo" notices there are always more levels to the Sailor V game. Bunny comes in and he invites her to play. He comments that she plays well, like she's one with Sailor V. Bunny mumbles that V's a good partner, continuing to play. "Endo" then points out that her hairstyle makes her look like Sailor Moon, going on to say "I wonder where Sailor V and Sailor Moon are when they're not fighting. Do they have some sort of Control Room?" This alerts Bunny and she starts to leave. "Endo" grabs her hand, and tells her to come back tomorrow, "I want to know all of your secrets...Bunny". After she leaves "Endo" wonders why she has not fallen under his spell. Bunny doesn't know what to do, she's afraid she'll tell him everything.

Reika notices Andy and "Endo" together again, wondering about this new guy. Lita and Amy see her, recognizing her as Andy's friend. Lita asks her about Andy and "Endo". Reika replies that she's known Andy, but not this new "Endo". Andy used to have a different friend Endo, but she has not seen him lately. No one at the University knows who the new "Endo" is.

Artemis tells Mina they cannot let "Endo" play the Sailor V game anymore. She thinks if he really is Darien, they have to be careful... However, "Endo" is determined to find the control room.

Lita stops Andy and "Endo" and demands to know what he's doing with Bunny. "Endo" turns and stares at her.

In the control room, Lita has called a meeting and the other scouts come running in. Lita announces that "Endo" is the Enemy, an agent of evil, after the Silver Imperium Crystal. An alarm goes off, warning of intruders. Lita lunges forward, grabbing the Crystal. Mina notices and quickly kicks Lita, knocking her down. The brainwashed "Tuxedo Mask" steps in, having found the control room. He comments how Lita almost got the Crystal for him, after easily falling under his spell.

Everyone but Lita and Bunny transforms. Andy, under "Tuxedo Mask's" influence, attacks Bunny, but is stopped by Venus' "Sailor V Kick". Then, she reverses the brainwashing with "Venus Love-me Chain". "Tuxedo Mask" gives an energy attack, which causes damage to the control room and reveals the Silver Imperium Crystal, which he grabs. Venus tells Bunny to morph and get the Crystal back, but she does not understand what is going on. Luna yells at her to fight. Still confused she wonders if this is real. Luna tells Bunny not to be fooled and jumps at "Tuxedo Mask's" shoulder. He easily knocks Luna away, slamming her into the wall. Bunny stares at the still form of Luna and realizes that the man in front of her is not the Tuxedo Mask. She morphs into Sailor Moon and uses "Moon Healing Escalation" which causes Luna and Lita to stir.

Then, Sailor Moon turns around, telling the fake "Tuxedo Mask" he can seduce her no longer. But, as she tries to use "Healing" again, Beryl appears and brings "Tuxedo Mask" back with her, telling the scouts this is their end, now that she has the Silver Imperium Crystal. Sailor Moon demands to know who this stranger is. Beryl introduces herself as the Ruler of the Dark Kingdom, taunting Sailor Moon with the knowledge that the fake "Tuxedo Mask" really is her Prince Endymion. She feels betrayed by Darien taking sides with Queen Beryl, but Mercury tells her Darien is just under a spell, and Beryl must be defeated. Beryl goes on to say it was the corpse of Darien that was reanimated to become an agent of evil.

"Tuxedo Mask" unleases another energy blast, this time nearly destroying the control room. The scouts do not counterattack since they do not want to destroy the area, and Beryl and "Tuxedo Mask" leave. Jupiter and Mercury move Andy out of the way. Then Mercury gets the calculations from Luna and uses "Hyperspace Area Formation" for the Sailor Scouts to follow Beryl. Queen Beryl's lashing hair reaches out, grabbing Sailor Moon away from her friends, choking her as Beryl demands the secrets behind the Crystal. Queen Beryl longs for immortality.

So long ago, at the beginning of time, she stood watching a strange meteor shower, before she was Queen Beryl of the Dark Kingdom. A pocket of energy came down from the sun. "It was the birth...of the goddess of evil." This Evil changed Beryl, she kneeled down before Metallia and began the campaign against the moon.

Sailor Venus then remembers Beryl as the woman, so long ago, who lead the people of the Earth against the moon, ruining the happiness, and killing the Prince and Princess. She angrily turns to Beryl wondering why she was reborn as well, telling her she is just a pawn to the Evil One. But, Queen Beryl intends to use the Silver Imperium Crystal for herself, not caring about Metallia, but only about ruling the world with Endymion at her side.

Queen Beryl increases the strangling pressure on Sailor Moon's neck, and Venus tries to cut the hold with her "Love-me Chain" but it is easily deflected. The "really mad" Venus gets back up, calling the Sword of the Moon to her hand, which she can barely pick up. Jupiter runs up and grabs it, heaving it up and slicing the hair from it's hold around Sailor Moon's neck.

The remaining hair still chokes Sailor Moon. Venus grabs the sword, lifting it high above her head, calling upon the Silver Millenium. Sailor Moon gaps "I can't die before I get you back! Darien! Endymion!" and the Silver Imperium Crystal floats in front of "Tuxedo Mask" and starts to glow. Sailor Venus swings the sword down, and it slices through Queen Beryl and begins to glow brightly, could it be the sword of the Silver Imperium Crystal? As Queen Beryl starts to crumble, she laments losing Prince Endymion. Back a lifetime ago, she had jealously watched Endymion and Serenity together. "I only...wanted...you..."

Deep in the Dark Kingdom, Queen Metallia notices Queen Beryl is destroyed and the power of the Sailor Scouts is growing.

Sailor Venus looks down at the glowing sword and notices an enscription. "When this sword shows its light...The Silver Imperium Crystal follows the heart of she who would become queen. Take the completed Crystal...and release the Great Power of the Moon. Give service to the Moon's Holy Tower, and once more bring peace to our kingdom..." The method of sealing revealed, Sailor Venus collapses. "Tuxedo Mask" grabs Venus and the sword and heads back to the Dark Kingdom, but Sailor Moon follows them, all three disappearing from the room.

Luna traces them to the North Pole, the Artic Circle. Mercury, Mars and Jupiter head out and Luna stays behind with Artemis, not fully recovered from "Tuxedo Mask's" earlier attack. From the control room, Luna directs the scouts through the distorted space they are in to an island in the Artic Circle and down underground.

Down in the cold of the Dark Kingdom, "Tuxedo Mask" notices Sailor Moon has followed him. He walks towards her, and she tries to get him to remember, he is Endymion and she is Princess Serenity. He comes up to her slowly, gently, but suddenly grabs her by the neck, holdingher high while demanding the secret behind the power of the Crystal. Sailor Moon just cannot believe that such a thing could be happening. Suddenly, the Crystal between them pushes Sailor Moon out of his grasp.

The other Sailor Scouts arrive at the door of the Dark Kingdom, joining Sailor Moon and the waking Sailor Venus. Darkness spreads out and Queen Metallia appears behind "Tuxedo Mask". He launches a powerful attack against the scouts, but it is blocked by Luna. She tells Sailor Moon to get the light her heart moved into Tuxedo Mask back. With the Silver Imperium Crystal whole, Queen Metallia can be destroyed. Mars tries to attack Metallia, but the energy is only aborbed into the Evil mass.

Sailor Venus is determined to get the Crystal back, and attacks with "Rolling Heart Vibration" which "Tuxedo Mask" easily deflects. Sailor Moon turns and uses "Moon Healing Escalation" but it is also deflected. She stares hopelessly into the cold eyes of the one she loves, wondering if she has to fight him, kill him. She cries "Nooo!" and the confusion in her heart causes "Tuxedo Mask" and the Crystal to react.

They look up at each other, and "Tuxedo Mask" once again attacks. Sailor Moon gets up, picking up the sword. She runs forward and gives Darien a desparate kiss. Then, she grabs the sword and begins to run it through herself.