For 10 idyllic years, young Mija has been caretaker and constant companion to Okja - a massive animal and an even bigger friend - at her home in the mountains of South Korea. But that changes when the family-owned multinational conglomerate Mirando Corporation takes Okja for themselves and transports her to New York, where image obsessed and self-promoting CEO Lucy Mirando has big plans for Mija's dearest friend.