The third Disney animated film based on the Diary of a Wimpy Kid series.

Greg faces the challenges of a new school year as his older brother Rodrick constantly teases and taunts him. Will Greg be able to find a way to get along with Rodrick or will a secret they both share end up ruining everything?

Greg Heffley is having a rough winter vacation. After damaging a snowplow with his friend Rowley, he fears he won't get the new video game console he wants for Christmas. To make matters worse, he gets snowed in with his grumpy older brother Rodrick and annoying younger brother Manny.

A middle-schooler navigates the challenges of school, friendship, and family while dealing with the pressure to fit in and succeed.