"Soreike! Anpanman: Sukue! Kokorin to Kiseki no Hoshi" is a feature-length anime film based on the popular "Anpanman" franchise, which centers on the adventures of Anpanman, a superhero made of anpan (a sweet bread filled with red bean paste). The story begins with Kokorin, a small star from the Star Village, falling to Earth after being separated from her family. Kokorin is a cheerful and curious character who possesses the ability to grant wishes, but her powers are limited and require the energy of other stars to function fully.

Anpanman and his friends, including Baikinman, Shokupanman, and others, encounter Kokorin and learn of her plight. They decide to help her return to her home in the Star Village. However, their mission is complicated by the arrival of a mysterious and powerful antagonist, Horrorman, who seeks to exploit Kokorin's wish-granting abilities for his own selfish purposes. Horrorman's actions threaten not only Kokorin's safety but also the balance of the entire Star Village.

As the story progresses, Anpanman and his friends embark on a journey to protect Kokorin and restore her to her family. Along the way, they face various challenges, including battles with Horrorman and his minions, as well as moments of self-discovery and teamwork. The narrative emphasizes themes of friendship, courage, and the importance of helping others, which are central to the "Anpanman" series.

The climax of the film involves a dramatic confrontation between Anpanman and Horrorman, culminating in a resolution that highlights the power of kindness and cooperation. Kokorin's return to the Star Village is ultimately achieved through the combined efforts of Anpanman and his friends, reinforcing the idea that even the smallest acts of bravery can make a significant difference. The film concludes with a sense of fulfillment and hope, as Kokorin reunites with her family and the Star Village is restored to its former harmony.