西班牙驚悚片。根據西班牙懸疑推理小說家多洛蕾絲·雷東多的代表作巴斯坦三部曲之《隱形守護者》，這是近年來西班牙最轟動的犯罪懸疑小說，比《沉默的羔羊》《犯罪心理》更驚悚，已經高踞西班牙暢銷書排行榜長達三年之久，講述巴斯克地區的一起連環殺人案。一名曾受過聯邦調查局訓練的警察回到位于納瓦拉的家鄉，追捕一名專以當地青少年為目標的殺手，還得面對自己過去的心理創

　　World War II is around the corner, but the only thing Sally Bauer can think of is the ocean. Her dream is to swim across the English Channel. Her father has tried to exorcise her obsession with swimming since she was a toddler, without success. An unwanted pregnancy forces her to abandon her dream – and herself. The child’s father does not want to be involved, so as a woman in the ‘30s in Sweden, Sally has no choice but to do what is expected of her: to be a mother. There is no place left for her dreams and Sally is pulled into bottomless darkness, until her sister Carla saves her. With renewed purpose, together the sisters begin to dismantle the conventions they are constantly facing. In late August 1939, Sally stands on the shore at Dover and takes her first step into the English Channel. She swims across the open and icy sea for 15 hours, waving to the Navy who are readying for war. A couple of days after Sally swims ashore at Calais, Poland is invaded.

　　陳薇（尹馨 飾）帶著女兒（林采潔 飾）為躲避家暴的丈夫住進有自殺勝地之稱的蝴蝶大廈后怪事頻傳。管理員梁伯（馮淬帆 飾）和頂樓的廟公山叔（蔡振南 飾）不斷提醒她這一層樓不太干凈，如果有能力還是盡快搬走，但是經濟拮據的她暫時只能棲身于此。各種三教九流的鄰居、雜貨鋪有陰陽眼的自閉癥男孩阿弟（白潤音 飾），還有那間被再三交代禁止靠近的613號房，一切都令陳薇感到詭異莫名。外表陽光的代班管理員小梁（曹佑寧 飾）對獨立堅強的陳薇照顧有加，經常借故上門幫忙維修家電，陳薇女兒看到他來也會難得露出微笑。正值鬼門開時，蝴蝶大廈內意外頻傳，甚至發生許多靈異事件，但老住戶們似乎已經習以為常。陳薇原本是想帶女兒逃離丈夫，不料卻將自己卷入更大危機之中...

　　奧爾索利亞是特蘭西瓦尼亞主要城市克盧日的一名法警。一天，她必須將一名無家可歸的男子從地下室驅逐出去，這一行動帶來了悲劇性的后果，使得奧爾索利亞必須盡力應對隨之而來的道德危機。