安娜正走出母亲离开的痛苦时,她妹妹克莱儿订婚的消息再次震撼她的世界,她与妹妹男友的室友亚瑟合作,打算破坏这场婚礼,无所不用其极使他们分开,试图挽救她的妹妹、他最好的朋友远离让自己终其一生的痛苦…Just as she is recovering from a breakdown, Anna's world is rocked when her younger sister gets engaged. She teams up with the alcoholic best man to break up the engagement; convinced they are trying to save her sister, his best friend, and themselves from a lifetime of misery.