George is a high-strung professional photographer who is starting to unravel from the stress of his work with a Manhattan advertising agency. Needing some time away from the city, Jake, his wife Kim, and their son Miles head to upstate New York to take in the winter sights, though the drive up is hardly relaxing for any of them. George accidentally hits and severely injures a deer that ran onto the icy road; after George stops to inspect the damage, he's confronted by an angry local named Otis who flies into a rage, telling George that he and his fellow hunters had been tracking the deer for some time. An argument breaks out, which leaves George feeling deeply shaken.
Ray Pelletier just wants to spend a pleasant and relaxing weekend ice fishing with his family. Alas, Ray's plans are ruined by the unwanted presence of the obnoxious big city father and son duo of Steve Cote and Stevie Jr. However, the two squabbling families are forced to set aside their differences and work together after a vicious monster awakens from the cold waters of the remote frozen lake area they are staying at.