"Where I am?" When Sora wakes up, she finds herself in a mysterious world. It seems that she got lost from Mashiro and the others... But there she met Yui, Manatsu and Preme! Plus: Preme transforms into Cure Supreme! Mashiro meets Laura, Amane and Nodoka on a small island in the sea and rescues Puca from a monster attack! Tsubasa meets Saaya, Kotoha and Haruka and takes a walk in the hanging garden! Ageha meets Asumi, Lala and Yukari, but Lala and Yukari are having trouble getting along! They find many friends, but for some reason, everyone's memories are confused... And it seems that in this world there is only one Precure...? We want to return to the world we belong to! The clue is a distant castle... This is where our journey begins! Let's go on a great adventure to the castle!