故事講述伯恩斯飾演的紐約客剛剛結婚，但甜蜜的生活被他妹妹的到來全部大亂了……NewlywedsBuzzyandKatiefindtheirblissfullifedisruptedbythearrivalofhishalf-sisterandnewsofhersister'smarriagetroubles.Buzzy(EdwardBurns,PurpleViolets,TheBrothersMcMullen)andKatie(CaitlinFitzgerald,It'sComplicated)areanewlymarriedcouplelivingaseeminglyconflict-freelife.ButwhenBuzzy'sdamagedandimpulsivehalf-sisterLinda(KerryBishe,NiceGuyJohnny)arrivesattheirdoorstepexpectingtostayforanindefiniteperiodintheirTribecaloft,heranticsthreatentodisruptthecouple'scommitmenttoan\"easy\"marriage.Meanwhile,withKatie'ssisterMarsha(MarshaDietleinBennett,LittleChildren)projectingsuspicionsofherownhusband'sinfidelityontoBuzzy,willthecouple'sformerlytrustingandinsulatedlifebeabletowithstandthedysfunctionsoftheirrespectivesiblings?