Middle-schooler Greg Heffley is the prime suspect when it is discovered that school property has been damaged, but when a surprise blizzard hits and school is closed, Greg is stuck indoors with his family, unable to prove his innocence.

Greg, stuck indoors with his family over the holiday because of a blizzard, suffers from claustrophobia and worries they will not be able to weather the storm. "Greg Heffley está en apuros. Han manchado una pared de la escuela y Greg is el principal sospechoso. Aunque, según él, es inocente-- o algo parecido. Parece que la policía anda tras la pista de Greg, pero una tormenta de nieve inesperada deja encerrada a la familia Heffley en casa. Greg...

"Let's face it: Greg Heffley will never change his wimpy ways. Somebody just needs to explain that to Greg's father. You see, Frank Heffley actually thinks he can get his son to toughen up, and he enlists Greg in organized sports and other 'manly' endeavors. Of course, Greg is easily able to sidestep his father's efforts to change him. But when Greg's dad threatens to send him to military academy, Greg realizes he has to shape up...or get shipped...