Synopsis: After a powerful storm damages their Maine home, David Drayton (Thomas Jane) and his young son head into town to gather food and supplies. Soon after, a mysterious fog rolls in and engulfs the town, trapping the Draytons and other shoppers inside the local grocery store. Terror mounts as deadly creatures reveal themselves outside, but that may be nothing compared to the threat inside, where a religious zealot (Marcia Gay Harden) calls for a sacrifice to appease God's wrath.