Greg Heffley is in big trouble. Someone has caused damage at school and Greg is the main suspect. Strangely enough, though, he is innocent. Or somewhat innocent...

And suddenly, a snowstorm hits their town and the Heffley family is trapped inside the house. Greg knows that when the snow melts he will have to face the consequences of his actions, but he can't help thinking that maybe punishment is better than being at home with his family...