"Elmer no Bōken - My Father's Dragon" is an anime adaptation of Ruth Stiles Gannett's classic children's novel "My Father's Dragon." The story centers on Elmer Elevator, a young boy who embarks on a daring journey to rescue a captive baby dragon named Boris. Elmer's adventure begins when he learns of Boris's plight from a talking alley cat, who informs him that the dragon is being held captive on Wild Island by a group of exploitative animals. Determined to save Boris, Elmer sets off with a knapsack filled with seemingly random items, including chewing gum, lollipops, and hair ribbons, which later prove crucial to his success.

The narrative unfolds as Elmer navigates the treacherous terrain of Wild Island, encountering various obstacles and hostile animals. Each encounter tests his resourcefulness and courage. The island's inhabitants, including tigers, crocodiles, and a rhinoceros, initially pose significant threats, but Elmer cleverly uses the items in his knapsack to outwit them. For instance, he distracts the crocodiles with lollipops and placates the rhinoceros with hair ribbons. These interactions highlight Elmer's ingenuity and determination.

As Elmer progresses, he eventually locates Boris, who is chained and guarded by the animals. Using his remaining supplies, Elmer devises a plan to free the dragon. The climax of the story involves a tense confrontation with the island's rulers, culminating in Elmer successfully liberating Boris. The two form a strong bond, and Boris becomes a loyal companion. Together, they escape Wild Island, marking the end of Elmer's perilous quest.

The anime captures the whimsical and adventurous spirit of the original story, emphasizing themes of bravery, friendship, and problem-solving. Elmer's character is portrayed as compassionate and resourceful, while Boris embodies innocence and loyalty. The supporting cast of animals adds depth to the narrative, each contributing to the challenges and triumphs Elmer faces. The series remains faithful to the source material, offering a visually engaging and emotionally resonant adaptation of a beloved children's tale.