In a small rural town, a notorious serial killer named Jack is being transported to his execution when a freak accident occurs. The prison vehicle collides with a genetic research truck in the middle of a snowstorm, resulting in Jack's body being exposed to experimental chemicals. Instead of killing him, the chemicals fuse Jack with the surrounding snow, transforming him into a menacing snowman with a thirst for vengeance. As he takes his new form, the town's inhabitants become unwitting targets of his supernatural wrath as Jack uses his newfound powers to exact revenge on those who wronged him.

The town's sheriff, Sam, who was responsible for capturing Jack originally, becomes the prime target of Jack's icy vendetta. As the crimes escalate, Sam struggles with the disbelief and fear among the townspeople while trying to protect his family and uncover a way to stop this bizarre and deadly threat. With each assault coming amidst blustery weather, the small community is thrust into fear and chaos. As Jack continues his icy rampage, Sam races against time to uncover the mystery behind Jack's transformation and find a method to defeat the snowman turned killer before it's too late.