"Soreike! Anpanman: Tenohira o Taiyō ni" is a feature-length anime film based on the popular "Anpanman" franchise, which centers around the adventures of Anpanman, a superhero made of anpan (a sweet bread filled with red bean paste). The story begins with Anpanman and his friends living in a vibrant world where they protect the innocent and spread kindness. However, a new threat emerges when a mysterious character named Tenohira, who possesses the ability to manipulate sunlight, begins causing chaos. Tenohira's powers are tied to his emotional state, and his anger and sadness create destructive solar flares that endanger the world.

As the situation escalates, Anpanman and his companions, including Baikinman (a mischievous antagonist), Shokupanman (a bread superhero), and others, must work together to understand Tenohira's motivations and find a way to calm his turbulent emotions. The narrative explores themes of empathy, forgiveness, and the importance of emotional balance. Anpanman, known for his selflessness, risks his own well-being to help Tenohira, demonstrating the core values of the series. The film balances action-packed sequences with heartfelt moments, culminating in a resolution that emphasizes the power of compassion and understanding. The characters' interactions and the moral lessons embedded in the story align with the franchise's longstanding focus on kindness and community.