The game's story centers on Mario as he tries to reclaim the seven Star Spirits, who have been sealed in playing cards by Bowser and his assistant, Kammy Koopa. Their combined power is required to negate the effects of the Star Rod, which makes Bowser invincible. Once Mario rescues all of them, he uses their assistance to defeat Bowser and rescue Peach. The story is presented in the context of a novel, with each adventure involving the rescue of a Star Spirit denoted as a single chapter. Peach is playable between chapters, where she allies with a star kid named Twink in the castle to relay vital information to Mario regarding his quest.