"Minami no Shima no Chiisana Hikouki Birdy" is a short anime series set on a small, remote island in the southern seas. The story centers on Birdy, a young boy with a deep passion for aviation, and his journey to build and fly his own airplane. Birdy lives with his grandfather, a former pilot, who inspires and supports his dream. The island's tranquil setting and close-knit community provide the backdrop for Birdy's aspirations and challenges.

The narrative unfolds as Birdy discovers an old, abandoned airplane in the island's forest. Determined to restore it, he enlists the help of his friends, including a girl named Nana, who shares his enthusiasm for flight. Together, they work tirelessly to repair the aircraft, facing technical difficulties and setbacks along the way. The project becomes a symbol of perseverance and teamwork, reflecting the islanders' spirit of cooperation and resilience.

As Birdy progresses with the restoration, he learns valuable lessons about engineering, problem-solving, and the importance of community support. His grandfather shares stories of his own flying experiences, deepening Birdy's understanding of aviation and its history. The series also explores themes of friendship, determination, and the pursuit of dreams, as Birdy and his friends navigate the complexities of their ambitious project.

The climax of the story occurs when Birdy successfully completes the airplane and prepares for its maiden flight. The entire island gathers to witness the event, underscoring the communal pride and excitement surrounding Birdy's achievement. The flight itself becomes a moment of triumph, not only for Birdy but for everyone who contributed to the project. The series concludes on a hopeful note, emphasizing the power of dreams and the impact of collective effort in overcoming obstacles.