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!...