前特種部隊隊員丹尼被迫重返一座偏遠孤島。一個殘暴又隱秘的組織為了報復，綁架了他的女兒亞歷克斯，并布下天羅地網，對他展開一場步步緊逼、針對他所有行動都早有準備的殘酷獵殺。

　　龍雁飛（許冠文 飾）是一個著名的武俠小說家，十年了都沒有新的作品面世了，不過以往的暢銷作品仍然帶給他客觀的收入，生活無憂。他的女兒Sophia（楊千嬅 飾）是個早已到了適婚年齡，但她戀愛運甚差，只想找一個真正可以過日子的人結婚，其實她一直暗戀自己的上司——花花公子Frankie（劉青云 飾）。Frankie因為意外要搬到Sophia的家住，龍雁飛看見自己心愛的女兒被Frankie當工人使喚，心里很不是滋味，便對Frankie充滿了敵意，但在后來的相處中，兩個男人又成了知己……

　　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.