ThewinterholidaysareturningouttobeespeciallystressfulforGregHeffleythisyear.AfteraccidentallydamagingasnowplowwhilemakingasnowmanwithbestfriendRowleyJefferson,Gregworrieshewon’tgetthenewvideogameconsolehesodesperatelywantsforChristmas.Tomakemattersworse,hegetssnowedinwithhisfamily,includinghisgrumpyolderbrotherRodrickandannoyingyoungerbrotherManny.
The mother of two adopted children's sense of duty takes a macabre turn when she learns that her husband may be having an affair with one of their kids.
