In 1999, the Janjira nuclear plant was mysteriously destroyed with most hands lost including supervisor Joe Brody's colleague and wife, Sandra. Years later, Joe's son, Ford, a US Navy ordnance disposal officer, must go to Japan to help his estranged father who obsessively searches for the truth of the incident. In doing so, father and son discover the disaster's secret cause on the wreck's very grounds. This enables them to witness the reawakening of a terrible threat to all of Humanity, which is made all the worse with a second secret revival elsewhere. Against this cataclysm, the only hope for the world may be Godzilla, but the challenge for the King of the Monsters will be great even as Humanity struggles to understand the destructive ally they have.

In a small town, an oil company is drilling for oil. The geologist, Dowd, informs his boss, Tenneson that they detected what could be an ecosystem which could affect their drilling rights. But Tenneson tells them to go on and something happens. Something came out and Tenneson wants to keep it quiet by keeping what came out on ice. In the town, something's been taking the fuel tanks off vehicles, leaving a big hole. Tripp, who lives in the town is frustrated at his life, specifically not having a vehicle of his own. He works at a scrap yard and he's been working on restoring an old truck. One day he thinks he hears something and traps it in the storage pit. He calls the Sheriff who's his step-father, whom he doesn't like. And when he gets there, it's gone. Later he sets a trap for it and sees it's a slug like creature who feeds on oil. He would bond with it. Later a man from the oil company shows up at the yard and asks him about the thing he reported earlier. Tripp feigns it was mistaken but the guy doesn't believe him. The creature enters the chassis of the truck he was working on and makes it move. He then gets in the truck and it goes off on it's own and he tries to figure out what to do.

Ron Hall (Greg Kinnear) lost track of what matters most in life. It took an affair, a confession, a dream and an unlikely friendship with a homeless man to help him remember. From the outside, Ron Hall's seemingly charmed life looked pretty perfect: He had a flourishing art business, a beautiful wife, Debbie (Renée Zellweger), two fine teen children, and an amazing fifteen thousand square foot house in Fort Worth, Texas. But appearances can be deceptive.