The Garden of Hope doesn't exist to be pretty. It exists because Nagisa and Honoka have already saved it once, and now they have to save it again, knowing what the cost of failure actually looks like. This movie doesn't reset them into new uniforms and call it growth; it drags three girls who earned their power into a fight that asks if they're willing to spend it all on a world that isn't even theirs. The witch isn't a villain. She's what happens when someone decides one kingdom's water is worth burning down everything else.
A magical kingdom on the brink of ruin calls for help, and three girls answer: Nagisa, Honoka, and Hikari transform into Precure to face an impossible threat. A witch has set her sights on the Diamond Line, sacred jewels that sustain the Garden of Hope through an annual ceremony. Without them, the kingdom withers. But the witch's ambitions run deeper. She seeks to resurrect the Dark Lord, a force so catastrophic that its return would obliterate not just one realm, but entire galaxies of light and color. The girls must cross into a fantastical world they barely understand, armed with courage and their transformation powers. Time works against them as the ceremony approaches and the witch's plan nears completion. What begins as a mission to protect one kingdom becomes a race to save everything. Friendship, determination, and the bonds between the Precure warriors are tested against overwhelming odds in a battle that will determine the fate of multiple worlds.