"Yo-kai Watch: Enma Daō to Itsutsu no Monogatari da Nyan!" is a feature-length anime film set in the Yo-kai Watch universe. The narrative centers on Nate Adams, a young boy who can communicate with Yo-kai, supernatural beings that influence human emotions and events. The story begins when Nate and his Yo-kai companions, Whisper and Jibanyan, are summoned to the Yo-kai World by Enma, the ruler of the Yo-kai World. Enma tasks Nate with a critical mission: to retrieve five legendary Yo-kai who have escaped into the human world. These Yo-kai, known as the "Five Treasures," possess immense power and could cause chaos if left unchecked.

The five Yo-kai are scattered across different locations, each tied to a unique story or legend. Nate, accompanied by Whisper and Jibanyan, embarks on a journey to find and return them. Along the way, they encounter various challenges, including rival Yo-kai and misunderstandings with humans. Each of the five Yo-kai has a distinct personality and backstory, adding depth to the narrative. For example, one Yo-kai is tied to a tale of unrequited love, while another is linked to a historical event. These encounters highlight the interconnectedness of the human and Yo-kai worlds.

As the story progresses, Nate learns more about the responsibilities of being a Yo-kai Watch user and the importance of balance between the two worlds. The climax involves a confrontation with a powerful antagonist who seeks to exploit the Five Treasures for their own gain. Nate and his friends must work together to prevent disaster, relying on their teamwork and the unique abilities of the Yo-kai they have befriended.

The film maintains a balance of humor, adventure, and emotional moments, staying true to the tone of the Yo-kai Watch series. It explores themes of friendship, responsibility, and the coexistence of humans and Yo-kai. The narrative is accessible to both fans of the franchise and newcomers, providing a self-contained story while expanding on the lore of the Yo-kai Watch universe.