Four years after Tom and Abby's 12-year-old daughter vanishes, she is found alive but strangely calm. When the teen refuses to testify against the man connected to her disappearance, Tom decides to investigate the traumatizing case on his own. Nothing can prepare him for what he is about to discover.


湯姆和艾比原本婚姻幸福、家庭美滿，他們有個漂亮的十二歲女兒凱特琳。可是有一天，凱特琳帶狗外出散步，卻再也沒有回來。四年過去了，夫婦倆在猜疑、罪疚、恐懼中憔悴，婚姻也瀕臨破裂。他們接受輔導，試圖改變，並打算藉著為女兒辦追悼會、立墓碑來「放下過去，繼續向前」。

就在追悼會當天，湯姆獲得訊息，得知有人看過他女兒，而且就在離他們不遠處。可是湯姆聽到的故事卻令夫妻倆陷入希望與失望的漩渦，倍受折磨。終於，艾比決定不再執迷於「希望」，要與湯姆分居。偏偏就在此刻，警方通知他們，凱特琳找到了。