A day that shouldn't exist traps the Precure in a loop where nothing makes sense and no one remembers the day before. The movie treats the premise as a genuine mystery to solve instead of a setup for spectacle, letting you watch the girls methodically piece together what's happening before the emotional weight lands. It costs you 90 minutes of linear time, but you leave understanding why this franchise matters to people who grew up watching transformation sequences feel like real stakes.

Three small fairies, Rabirin, Pegitan, and Nyatoran, find themselves swept away to a strange place, where they run into Mirakurun, a fairy on the run from a pursuer. Before sending the trio home, Mirakurun hands them three Miracle Lights. Elsewhere, Nodoka crosses paths with the Hugtto and Star Twinkle Precure teams, and together they encounter Refrain, the one hunting Mirakurun. Refrain has the power to turn back the clock each day, resetting everyone caught in his reach, but anyone holding a Miracle Light stays untouched by his rewinding. With multiple Precure teams thrown together against a threat that erases time itself, the movie leans into crossover spectacle and the promise that a small gift of light can hold back an enemy who controls the day itself.