For 10 years, young Mija has been the caretaker of Okja, a giant animal and close friend, in the mountains of South Korea. When the Mirando Corporation kidnaps Okja and takes her to New York, CEO Lucy Mirando (Tilda Swinton) has plans for her. Determined to rescue Okja, Mija embarks on a mission, only to face obstacles from various groups fighting over her fate, while she just wants to bring her friend
