Ash, Pikachu, Misty and Brock arrive at Mt. Moon to find Seymour the scientist being attacked by zubats outside of their caves. Seymour explains that someone has placed lights within the caves and that this has disturbed the pokémon who live in the dark there. He tells of his theory that someone is searching the caves for the legendary and elusive Moon Stone which increases the power of pokémon. His theory proves correct and the ones after the Moon Stone turn out to be none other than Team Rocket. After befriending a clefairy, our friends are led to the Moon Stone which the clefairy hold as sacred. Team Rocket arrives to try to take the Moon Stone from the clefairy.