Gloria (Anne Hathaway) drinks too hard and parties too much. Her boyfriend has enough of it and throws her out. Gloria returns to her hometown, dreaming of making a new start, but instead revives her childhood friendship with Oscar (Jason Sudeikis), who runs a bar. After drinking a night away with Oscar and his friends, he wakes up to discover a gigantic monster rampaging through Seoul and realizes that somehow the monster is connected to her.