The Story
First off...I should tell u that there are many seasons of Sailor Moon. There is the regular Sailor Moon, which leads to Sailor Moon R, then Sailor Moon S, then Sailor Moon SS, and then Sailorstars...I don't know how that goes though...I just heard of Sailorstars recently. Though Sailor Moon is an excellent series of anime and manga both, I haven't really kept up with it.
One thousand years ago, all the planets were at peace. The place known as the Silver Millennium was a happy and prosperous place. The universe was ruled by Queen Serenity, who lived on the Moon with her daughter Princess Serena. The Moon Kingdom led all of the planets during the Silver Millenium.
However, a threat to this long-lasting peace existed in the form of the Negaverse. The Negaverse was the direct opposite of the universe of the Moon Kingdom. It was a place of hatred, deceit, cruelty, torment, and evil. At the core of the Negaverse, an entity existed which was the main force in the Negaverse, called "The Negaforce". The Negaverse itself was ruled by an evil woman, Queen Beryl. With the help of the Negaforce, Beryl planned to conquer the universe, starting with the Moon.
During a lunar eclipse, Queen Beryl led her army to the moon, and quickly began their attack. In the middle of the battle Serena gave Darien (Prince of Earth), who was her true love, her star locket so he would never forget her. It ended almost as quickly as it had started. The warriors of the Moon Kingdom were no match for the overwhelming, relentless forces of the Negaverse. Four young girls, the princesses of their respected planets (the sailor scouts), attempted to fight off the tremendous Negaforce, but their attempt proved to be futile. Queen Beryl succeeded in defeating the Moon Kingdom and killing everyone, including Queen Serenity's only daughter.
After the decisive battle, the Negaverse claimed victory. Queen Serenity knew that she could not let the Negaverse win. She resorted to one final act. Using the power of her Imperium Silver Crystal, Queen Serenity purged the universe of its invaders. Queen Beryl, the Negaforce, and the Negaverse's army were all sent back to the Negaverse. Also, she sent many of her people away, so that they may live in peace once again. Her daughter, along with her court of princesses and their two cats advisors, was sent one thousand years into the future, to the present-day earth. Queen Serenity gave away her life, so that her people, and her universe could live in peace once more. She knew her daughter must live on, because she was destined to be the next Queen of the Universe.
But if Queen Beryl tried to break into our universe once again, Luna and Artemis (the cats advisors) would find and alert the Sailor Scouts to fight off any new threats from the evil Queen. Queen Beryl had sworn that she would conquer the universe and one thousand years after the destruction of the Moon Kingdom, she had her chance once again. This is when the adventures of Sailor Moon and the other Sailor Scouts really began.
Sailor Moon is a story about a clumsy, crybaby, 14 year old girl named Serena(Usagi Tsukino). One day on her way to school, she met a black cat named Luna. To her surprise the cat could talk and told her that she was one of the cats advisors. Luna's mission, as she explained it, was to guide a group of warriors (the sailor scouts) and find the lost princess of the moon. The cat gave her some transformation items and super powers. Usagi transforms into the Pretty Soldier Sailor Moon to fight against evil. But even as the super hero, Sailor Moon is still a clumsy crybaby. Then, as time went by, Usagi was joined by some other girls to form a team of sailor suited fighters. Sailor Mercury, Sailor Mars, Sailor Jupiter and Sailor Venus appeared in the first season. Sailor Chibi Moon appears in the second half of the second season (Sailor Moon R). As for Sailor Uranus, Sailor Neptune and Sailor Pluto, they appeared in the third season (Sailor Moon S). And then later in the Stars Season, the Sailor Starlights (Sailor StarFighter, StarHealer, and Starmaker) joined the scouts.