Graham Hayes (Mel Gibson) is an ordinary farmer in a small town in Philadelphia, USA. When he woke up one morning, he and his family unexpectedly found several huge ring-shaped mysterious patterns tightly linked together in his cornfield. This surprised the Graham family, because there were no footprints in the cornfield at all, and it looked like a trace of an alien spacecraft landing. Soon, news of the mysterious pattern appearing overnight spread all over the world, and people were terrified and anxious all day long. The media, reporters and audiences across the country also shifted their focus to this small town in the southern United States at the speed of the wind, focusing on the Hayes family in Bucks County. Is this mysterious crop circle, which is 500 feet wide, a prank made by someone maliciously, or a trace of the arrival of aliens riding UFOs, or the result of some kind of supernatural event? Only Graham found some clues and decided to track it down...