Chet Ripley komaj čaka, da se z družino odpravi na dopust v naravo, kjer si bo napolnil baterije ter preživel nekaj kvalitetnega časa z ženo in dvema otrokoma. Potem pa njegove visokoleteče načrte pokvari svak Roman, ki se nenapovedano prikaže s svojo čudaško familijo. Ker Chet in Roman nimata popolnoma nič skupnega, se vse skupaj seveda sprevrže v pravo malo katastrofo.
Big-hearted Chicago family man Chet has brought his family to a lakeside resort area, and although his wife and kids aren't quite as excited as he is, Chet has high hopes for the vacation. However, his optimism is sabotaged when his obnoxious brother-in-law Roman drops in unexpectedly, along with his snooty, strange family. Chet and his family try to stay open-minded, but they find it difficult to relax and enjoy themselves because of the constant annoyance of Roman's presence.