"Crayon Shin-chan: Densetsu o Yobu Odore! Amigo!" is a feature-length anime film based on the popular "Crayon Shin-chan" series. The story centers on Shinnosuke "Shin" Nohara, a mischievous and energetic five-year-old boy, and his family, who find themselves entangled in an unexpected adventure. The narrative begins with the Nohara family winning a trip to Mexico, where they plan to enjoy a relaxing vacation. However, their plans take a dramatic turn when they encounter a mysterious boy named Amigo, who is being pursued by a group of shadowy figures.

Amigo, a cheerful and resourceful child, reveals that he is the key to an ancient legend involving a hidden treasure tied to the history of Mexico. The treasure is said to possess immense power, and the antagonists, a criminal organization, seek to exploit it for their own gain. As the Nohara family becomes embroiled in the conflict, they must protect Amigo and uncover the truth behind the legend. The story blends humor, action, and cultural exploration as the characters navigate Mexican landmarks, interact with locals, and face various challenges.

Shin’s antics and comedic personality provide levity throughout the film, while his family members—Misae, Hiroshi, and baby Himawari—each contribute to the unfolding events in their own ways. The film also introduces new characters, including allies who assist the Noharas in their quest and adversaries who pose significant threats. The narrative builds toward a climactic showdown, where the true nature of the treasure and its connection to Amigo are revealed. Themes of friendship, family bonds, and cultural appreciation are woven into the story, making it both entertaining and meaningful. The film concludes with the Nohara family reflecting on their adventure and returning home, having grown closer through their shared experiences.