During an expedition on Angel Island, a physician stumbles upon a peculiar newborn bird named Kyoro-chan. Their friendship blossoms, leading them to embark on a global journey. However, tragedy strikes three years later when a storm leaves them stranded after attempting to revisit Angel Island. While Kyoro-chan safely reaches the island, the Doctor mysteriously disappears. With a heavy heart, Kyoro-chan prays for the Doctor's safe return, beginning a new chapter of life on Angel Island.