美国联邦调查员麦特班森带着妻子宝拉与五岁的女儿蒂娜，被派驻到义大利西西里岛的吉诺斯特拉火山（Ginostra），去保护一桩谋杀案的关键证人──一名11岁男孩艾托瑞。 艾托瑞的家人在汽车里被炸死了，他是唯一的生还者。麦特假意收养艾托瑞，希望能从艾托瑞口中问出内幕、指认凶手，却悄悄泄露出隐藏在麦特与艾托瑞背後的悲剧，一个连妻子宝拉都毫不知情的秘密。 秘密与谎言，像即将爆发的Ginostra般，麦特一家人正一步步通往地岳之门。外在的危机，内在的恐惧，被遗弃的孤儿陷入两难的泥淖…… 　　 　　Matt Benson, an FBI investigator, has been posted to the island of Panarea in the Lipari archipelago within the framework of an agreement between the USA and Italy. He has been allocated a comfortable, well-protected house with vast grounds and a private cove facing the Ginostra volcano. This delights his wife Jessie and their 5-year-old daughter Tina. A few days after they arrive, a 11-year-old boy, Ettore Greco, a Mafia victim, is questioned by Matt about the death of his whole family in a car bombing. For security reasons, Matt decides to bring Ettore to the house where he is living. This artificial adoption gradually reveals the tragic secret binding Matt to the child, a secret Jessie knows nothing about. From secrets to lies, the atmosphere in the villa slowly leads the Benson family to the gates of hell. Outside is the danger, inside is the fear. In between is an orphan child...