A 14-year-old college girl, Usagi Tsukino (Bunny Tsukino in the French version of the manga, Bunny Rivière in the French version of the animated) discovers that she has been elected to become Sailor Moon, justice of the moon, and that her duty is to find and protect the Silver Crystal and the Moon Princess, whose kingdom, based on the Moon, was destroyed by the darkness of centuries ago. It will have to fight these enemies wishing to conquer the Earth ...