"The Earth was devastated by ecological disater. The entire planet froze over and all living beings were placed in a state of dormancy. They slept until the 30th century when Neo-Queen Selenity came to the throne and used the powers of the Ginzuishou (Silver Crystal) to reawaken the planet. Earth was prosperous again, and Crystal Tokyo was the bustling hub of business and the arts. But unfortunately these prosperous times were not to last. Belligerent forces from beyond the universe appeared, intent on conquering Earth. After a lengthy and costly war we repelled them. Some of our enemies accepted cleansing from the Ginzuishou, but most refused and were banished into space. Crystal Tokyo was once again restored to peaceful times... until the Dark Moon came."

"The Dark Moon is a mysterious rogue moon which appeared at the edge of our solar system, discovered lately because of its erratic orbit. We only discovered it because of the enormous amount of negative energy it was emitting - dangerous levels, far greater than the energy emitted by a white dwarf or pulsar."

"...Little by little the people there absorbed the negative supernatural energy. From them descended the Black Moon Family - fearsome creatures with awesome powers. Then, not long ago, a huge burst of energy pulsed out from the Black Moon and attacked Crystal Tokyo. Our losses have been devastating. They've conquered almost the whole planet and cast an evil spell upon the entire populace. Only myself, and the four guardians of the Crystal Palace are still awake. Sailor Mars, Sailor Mercury, Sailor Jupiter, and Sailor Venus have been casting thier energy to protect the palace."