As two couples are driving on a remote mountain road, their mini-van blows a tire. The two men, who happen to be brothers, get out to repair the tire. But before they have a chance to leave, a curious Grizzly bear appears at the edge of the woods. Wall Street hot-shot Sam pulls out a gun and kills the bear. Big mistake. Suddenly the bear's mate, a ferocious eight-foot-tall Grizzly, arrives on the scene and attacks. Now the group, trapped in their mini-van, must use their wits and courage to fend off the vicious assault and survive. As they battle the surprisingly cunning and intelligent creature, secrets between the brothers and their own mates begin to emerge. Will the shocking revelations tear them apart before the bear does?