Serial killer is genetically mutated in car wreck on the way to his execution. After which, he becomes a murdering snowman hell-bent on revenge for the sheriff who caught him.

College student Lewis decides to drive across the country to see Venna, a friend who doesn't know that Lewis is interested in her romantically. Unfortunately for his plans, Lewis gets saddled with his raucous-spirited older brother, Fuller, whose on-the-road pranks get the brothers and Venna sucked into a nightmare when a psychotic truckdriver takes offense.