On the day she moves from the island, She meets Laura, a mermaid girl who has come to the earth alone in search of the legendary warrior, PreCure. Laura's hometown, Grand Ocean, is attacked by a witch ...

Then she also finds other Pretty Cure girls in her school, 14-year-old Minami Kaidou as Cure Mermaid and 13-year-old Kirara Amanogawa as Cure Twinkle. As the Princess Pretty Cure team, with two ...