Returner (film)

"Returner" is a 2002 South Korean science fiction action film about a skilled martial artist and time traveler named Ji-hwan. He is sent from the future to prevent an apocalyptic war caused by deadly machines called Sentinels. Using advanced technology, Ji-hwan navigates different timelines, battling cybernetic enemies and working to stop the impending catastrophe. The film combines intense action sequences with a complex plot involving time travel, futuristic warfare, and human resilience. Overall, it explores themes of sacrifice and the struggle to save humanity from destructive forces across different moments in time.