ソラが目を覚ますとそこは見知らぬ世界であった。ましろたちとははぐれてしまったらしいソラはモンスターに襲われるも、キュアプレシャスとキュアサマーに助けられる。ソラはゆいとまなつ、そしてプリムと出会って仲良くなり行動を共にする。
一方ましろは小島でローラやあまねと妖精プーカを助け、ツバサとエル、あげはもそれぞれ別の場所で他のプリキュアたちと出会う。しかしそれぞれの記憶があやふやな状況な上に、この世界にいるのはプリキュアだけだということに気づく。
そうした中、遙か遠くに城が見える。元の世界に戻るため、それぞれのチームは団結し合いながら手がかりと思われるその城へと向かうことになる
A great Pretty Cure gathering! Or so we thought. They've actually been separated~!?
"Where am I...?" --When Sora wakes up, she finds herself in a mysterious world... It seems that she has lost Mashiro and the others.... But there she meets Yui, Manatsu, and Prim! What's more, Prim transforms into Cure Supreme! Mashiro meets Laura, Amane, and Nodoka on a small island in the sea, and rescues Puka from a monster attack! Tsubasa meets Saaya, Ha-chan, and Haruka, where they take a walk in the hanging garden! Ageha meets Asumi, Lala and Yukari, but Lala and Yukari are having trouble getting along! They meet a lot of friends, but for some reason, their memories are all a little hazy... And it seems that the only people in this world are Precure...? We want to go back to our own world! The clue is a castle in the distance-- Onward! Our journey begins here! Let's go on a great adventure to the castle!
