A couple on the verge of a nasty divorce attempt to sell their empty love nest and move on with their lives, separately. After a successful open house they are horrified to discover, days later, that a potential buyer didn't leave their home. While Alice is being held captive in the basement, the unannounced house guest moves in upstairs. She senses her capture is being kept a rebellious secret. She knows her way only way out if she can only get out alive.

　　影片参加了2010年的圣丹斯电影节，发行版权以480万美元的价格被焦点影业买走，成为了那届圣丹斯上最值钱的电影。
　　妮可（安妮特·贝宁 Annette Bening 饰）和朱尔斯（朱丽安·摩尔Julianne Moore 饰）是一对相伴很久的同性伴侣。并有2个孩子：马上要18岁的乔妮（米娅·华希科沃斯卡 Mia Wasikowska 饰）和15岁的莱塞（乔什·哈切森 Josh Hutcherson 饰）。妮可的医生职业很有压力常常忽视了朱尔斯日子还算太平的过着，直到有一天，莱塞向姐姐建议，他想和那个捐出自己精子的男人见一面。因为姐姐已经到了18岁，她有权利向家里提出这个要求。妮可和和朱尔斯同意了姐弟俩的愿望，他们见到了在生物学上的父亲保罗（马克·鲁弗洛 Mark Ruffalo 饰）。可是见面之后会发生什么呢？这个平静而美满的家庭会因此出现裂缝么？