Usagi Tsukino is a little clumsy and a crybaby, but she's also one spirited eighth grader. One day she meets Luna, a black cat with a crescent moon mark on her forehead, and transforms into the pretty guardian of love and justice in a sailor suit, Sailor Moon! As a chosen guardian of justice, Usagi apparently has a mission to protect a princess, and to find her fellow Guardians and the phantom Silver Crystal.

When a strange phenomenon starts turning people into monsters, Usagi and her friends learn that a secret organization called the Death Busters is responsible. Led by their all-powerful ruler Pharaoh 90, these alien beings are determined to invade Earth to make it their second home.