Ray Pelletier is looking forward to a quiet weekend of ice fishing with his family. Unfortunately for him the obnoxious big city father-son duo of Steve and Stevie Cote has picked the same weekend to spend at the remote frozen lake. But the two families' petty squabbles are soon eclipsed by a much greater enemy: something has awoken under the ice and its prey is human. Miles from civilization and with only a few inches separating them from the freezing water below, the Pelletiers and Cotes must now find a way to work together to fight the vicious creature that's out to hunt them.