The pacing whiplash is real: three completely different stories, three different tones, zero connective tissue between them. You get a straightforward rescue mission, then a kingdom-scale fight, then a silent comedy with a ghost that has zero stakes but somehow the most charm. It's the movie equivalent of a Precure fan's dream playlist rather than a coherent film, which somehow makes it work, each segment knows exactly what it is and doesn't apologize for the tonal shift.
The four girls of Go! Princess Precure headline a triple feature of three separate short adventures. In one, a strange invitation to a Princess Convention leads them to the Pumpkin Kingdom, where Haruka learns that Princess Panpururu has been imprisoned by the false minister Warp and sets out to free her. In another, a 3DCG tale, the Precure join the princess Refi in the Night Kingdom, a land that has lost its daytime, and fight to win the daylight back from the Night Pumpkin. The third is a wordless 3DCG short in which Cure Flora meets a mischievous ghost in a mirror and ends up in a mimicry contest with her own reflection.