Usagi and Luna have at last found a fellow senshi to join in the battle. It turned out to be the genius girl Mizuno Ami, who also happens to be Usagi's classmate. As Sailor Mercury and Sailor Moon, they must find more senshi to participate in war they have waged against the Dark Kingdom. The ultimate mission of the Sailor senshi is to find their Princess and to stop the Dark Kingdom from obtaining a jewel of unknown power, the legendary Silver Crystal. Luna wants to find the remaining senshi as quickly as possible, and continues to try to learn more of the mysterious senshi, Sailor V. Since Sailor V has been active as a senshi before Sailor Moon had even awoken to her powers, Luna has a hunch that she may be the princess they are searching for. At the same time, there has been an increase in the amount of missing-girl cases across the world. Believing that youma may be the cause of these incidents, Usagi and Luna begin investigating them. They become interested in a particular rumour s