Sora Harewataaru wakes up alone in a strange world, with no sign of Mashiro, Tsubasa or Ageha. She soon teams up with Yui and Manatsu, Cures from other teams, and with Prim, who transforms into a Pretty Cure called Cure Supreme. Her scattered friends are forming groups of their own elsewhere, Mashiro rescuing a rabbit-like creature named Puka from a monster, yet everyone's memories are hazy and the only people in this world seem to be Pretty Cure. All of them set out for a castle on the horizon. The film marks the franchise's 20th anniversary.