"Eiga Smile Precure: Ehon no Naka wa Minna Chiguhagu!" is a film adaptation of the "Smile Precure!" anime series, which follows the adventures of a group of magical girls. The story begins when the Smile Precure team—Miyuki Hoshizora, Akane Hino, Yayoi Kise, Nao Midorikawa, and Reika Aoki—are transported into a magical storybook world. This world is inhabited by characters from classic fairy tales, such as Cinderella, Snow White, and the Little Mermaid, but with a twist: the stories have become chaotic and disjointed due to the interference of an evil force.

The main antagonist, Pierrot, seeks to disrupt the harmony of the storybook world by spreading chaos and confusion. Pierrot's actions cause the fairy tale characters to act out of character, leading to a series of misadventures and conflicts. The Smile Precure team must navigate this fractured world, restore order to the fairy tales, and confront Pierrot to prevent the chaos from spilling over into the real world.

Throughout their journey, the Precure team encounters various fairy tale characters, each of whom is struggling with their own altered narratives. By helping these characters resolve their issues, the team gradually uncovers the source of the disruption and works to restore the original stories. The narrative emphasizes themes of teamwork, perseverance, and the importance of staying true to oneself, even in the face of adversity.

The film culminates in a climactic battle against Pierrot, where the Smile Precure team must combine their strengths and harness the power of their Smile Pact to overcome the villain's chaotic influence. The resolution of the conflict not only restores balance to the storybook world but also reinforces the bonds between the Precure team members, highlighting their growth as individuals and as a team. The story concludes with the fairy tale world returning to its rightful state, allowing the characters to live out their stories as intended.