"Eiga HappinessCharge PreCure! Ningyō no Kuni no Ballerina" is a film adaptation of the "HappinessCharge PreCure!" anime series, which is part of the long-running "Pretty Cure" franchise. The story centers on the main protagonists, Hime Shirayuki (Cure Princess), Megumi Aino (Cure Lovely), Yuko Omori (Cure Honey), and Iona Hikawa (Cure Fortune), who are magical girls tasked with protecting the world from evil forces.

The narrative begins when the girls encounter a mysterious ballerina named Kanon, who hails from the Doll Kingdom, a magical realm inhabited by sentient dolls. Kanon seeks their help to save her kingdom from the villainous Phantom Empire, which has invaded and plunged the Doll Kingdom into chaos. The Phantom Empire aims to drain the kingdom of its happiness energy, a vital resource that sustains the dolls and their world.

As the PreCure team ventures into the Doll Kingdom, they face numerous challenges, including battles against the Phantom Empire's minions and the emotional struggles of the dolls, who are losing their ability to feel joy. The story explores themes of friendship, resilience, and the importance of happiness, as the PreCure team works to restore hope and harmony to the kingdom. Kanon’s personal journey is also a focal point, as she grapples with her role in protecting her homeland and her growing bond with the PreCure team.

The film features high-stakes action sequences, heartfelt moments, and the signature transformation scenes characteristic of the "Pretty Cure" franchise. The PreCure team’s unity and determination are tested as they confront the Phantom Empire’s leader, ultimately leading to a climactic battle that determines the fate of the Doll Kingdom. Through their efforts, the girls demonstrate the power of teamwork and the enduring strength of happiness, reinforcing the core values of the series.