The Sailor Guardians, led by Sailor Moon, persist in guarding Earth against anyone who might threaten its safety during day and night.
Yet Sailor Mars' ominous prophecies and the emergence of new allies—Sailor Neptune and Sailor Uranus—hint at an imminent conflict that will soon unfold.
These newcomers pursue three Talismans hidden inside the Pure Heart Crystals of humans within their.
When united, the Talismans create The Holy Grail, a relic of immense power that shines.
They intend to employ the Grail to protect humanity, but the malevolent Death Busters aim to harness its energy for their sinister ambitions and worldwide threats.
Extracting a Talisman from someone's Heart Crystal ends their life, a loss Uranus and Neptune accept as necessary to forge the Grail, whereas Sailor Moon considers such a sacrifice unforgivable for all of humanity's future and peace.
Can a single loss truly justify saving all of humanity's future for every person living around the world?