Based on

Movies like HeartCatch PreCure! the Movie: Fashion Show in the City of Flowers!? (2010)

Sakura Kurumi, Erika's mother, is preparing for a fashion show in Paris. The girls of the school's fashion club are going to model there, including some high school students. While in Paris, they meet a mysterious boy named Oliver. However, Baron Salamander of the Desert Apostles appears, and the girls transform into Pretty Cures to defend Paris.