Chet Ripley, a hard-working family man, packs up his family for a vacation at a lakeside resort in the mountains. However, any hope at peace and tranquility is squashed the moment Roman, his obnoxious brother-in-law, shows up with his wife and kids. Chet does his best to keep his patience and try to enjoy the wilderness, but due to Roman's constant annoying presence, the vacation can't end soon enough for the Ripleys.