"Alienoid" is a South Korean science fiction action film directed by Kim Joo-won. The movie takes place in the Goryeo era and follows the story of a high-ranking government official named Lee Ahn (played by Kim Ok-bin), who captures an alien and brings it back to the palace. However, the alien escapes and starts causing chaos, leading Lee Ahn to team up with a skilled warrior named Mok (played by Rain) to capture it.