When a mysterious fog sets upon the small town of Rowley, Pennsylvania, its residents quickly find themselves isolated from the world. As the thick haze envelopes their once peaceful town, all communication systems fail and residents begin to go missing. As order gives way panic, the town devolves into violent lawlessness, every citizen with a score to settle acting out their darkest impulses hidden by the cloak of fog. Amidst the chaos, Ben Dowling realizes something is terribly wrong. It's not just how people are acting crazy; there's something more. There's something out there butchering people. Something that is evil and vicious. Something that is hungry. Ben and his childhood friend Elise venture out into the unknown and confront the shadowy figure behind the mist. Dodging the chaos in the streets they have only each other to depend upon as they try to save their hometown from complete destruction.