Margaret, Julie and Tonya set their own differences aside to carry out every possible plot, plan, and scheme in attempts to break up their brother’s wedding. The ringleader, Margaret, is happy with her life of “barbecue, beer, and babes,” until Tommy and his fiancée, Keri, offer some choice words about Margaret and her sisters. Already suspicious of Keri, Margaret begins her own reconnaissance, and unearths other misdeeds and half-truths of Keri and takes matters into her own hands.