The winter holidays are turning out to be especially stressful for Greg Heffley this year. After accidentally damaging a snowplow while making a snowman with best friend Rowley Jefferson, Greg worries he won't get the new video game console he so desperately wants for Christmas. To make matters worse, he gets snowed in…

yle=color: rgb(17, 17, 17); f>　黛比（瑞茜·威瑟斯彭饰）和彼得（阿什整理·库彻饰）是最好的同伙，但性情却判然不同。黛比渴想和儿子在洛杉矶过着通俗生存；彼得则在不竭改变的纽约奋力拼搏。他们决定互换屋子并体验彼此的生存，一周后，他们发明本人神驰的一切可能并不是心里真正必要的对象。

古古和曼达洛人再次重聚，在危险的银河系联络盟友。