Once the moon is full, Luna leads the group to the park, where Usagi has flashbacks of seeing Mamoru at the park. Her emotions leave her overwhelmed, and Makoto comforts her. Luna chants a strange language, and a circle appears. Luna tells them to get in the circle to morph. They morph, hold hands, and fly into space until they reach the moon.
It is cold, dark, and quiet; the surface is covered with craters. Luna tells them they must head for the Mare Serenitatis- Sea of Serenity. They pass a bunch of ruins and blue-white pillars, and walk through the Prayer Room, where only the Queen could enter. The senshi see a sword in the ground, and Luna tells them to pulll it out. Although it is difficult, Venus manages to pull out the stone, which is made of stone. A hologram appears; it is the image of Queen Serenity! The queen tells Mercury, Mars, Venus, and Jupiter that the sword is theirs for protecting Sailor Moon. She says that she lost her body and the moon's computer shut down but the sub-computer booted up, leaving her will in that form. She awoke the cats from their cryogenic sleep.
She tells them of their past- Princess Serenity sneaked to Earth, where she found love. The people of the Silver Millenium had a long lifespan to watch over Earth and protect the ginzuishou. The Enemy was born from a dark spot in the sun, and tried to take control of Earth by controlling the people and telling them to attack the moon. Prince Endymion tried to keep peace, but he was stabbed in the back when trying to protect Princess Serenity. In sorrow, Serenity committed suicide. Queen Serenity was so sad, she made an incomplete seal when trying to seal away the enemy. She tells Sailor Moon that she must seal away the evil ones by having faith in herself. Venus says that something is wrong with the ginzuishou, and Queen Serenity explains that Sailor Moon's desire to save Tuxedo Kamen caused the fragment of the ginzuishou to enter his body. As Serenity gives Sailor Moon some last words of inspiration, her power runs out and the hologram disappears.
The senshi return to Earth. Meanwhile, Kunzite discovers Jadeite, Nephrite, and Zoicite as small stones. He sees Beryl head toward the doors of Metallia and use a chant to open the door. Metallia has nearly solidified, and she says there is a way that they can use Kamen in their plans. Kunzite is sent out on one last mission to get the ginzuishou. He freezes Tokyo to lure Sailor Moon out, and it works. She uses Moon Healing Escalation to melt the ice, and Kunzite chases her for the crystal. They fly into space, and Sailor Moon demands the return of Kamen. The Senshi fly into space and used their combined power to kill Kunzite. The Kunzite stone appears next to the other generals' stones. Beryl revives Kamen under her spell, and tells him to kill Princess Serenity and get the ginzuishou. The next day, Mamoru walks the streets again.