希尔维亚(妮可·基德曼 Nicole Kidman饰)是非洲籍的联合国翻译员。无意间她听到一桩政治阴谋,联合国大会上他们策划谋杀一名非洲元首。他们用非洲土话来交谈,不料被掌握这门语言的希尔维亚窃听机密。 希尔维亚因此成为别人急于除掉的眼中钉。FBI派探员托宾(西恩·潘 Sean Penn饰)做希尔维亚的临时保镖。性格迥异的两人在相处中渐渐了解对方的身世和背景,这时托宾怀疑希尔维亚可能藏着一段不为人知的秘密,希尔维亚和这个卷入谋杀计划的非洲元首之间,似乎有着深仇大恨。这令到托宾心生疑窦:希尔维亚到底是事件的受害者,还是阴谋的参与者? 托宾既心存怀疑,又要坚定地履行职责,保护希尔维亚。二人在猜忌中互相吸引着。在越来越危险的境地下,他们必须尽快查出真相。Escalating events begin when U.N. interpreter Silvia Broome alleges that she has overheard a death threat against an African head of state, spoken in a rare dialect few people other than Silvia can understand. With the words "The Teacher will never leave this room alive," in an instant, Silvia's life is turned upside down as she becomes a hunted target of the killers. Placed under the protection of federal agent Tobin Keller, Silvia's world only grows more nightmarish. As Keller digs deeper into his eyewitnesses' past and her secretive world of global connections, the more suspicious he becomes that she herself might be involved in the conspiracy. With every step of the way, he finds more reasons to mistrust her. Is Sylvia a victim? A suspect? Or something else entirely? And can Tobin, coping with his own personal heartache, keep her safe? Though they must depend on one another, Silvia and Tobin couldn't be more different. Silvia's strengths are words, diplomacy and the subtleties of meaning, while Tobin is all about instinct, action and reading into the most primal human behaviors. Now, as the danger of a major assassination on U.S. soil grows and Silvia's life hangs in the balance, Silvia and Tobin play out a gripping dance of evasion and revelation that keeps them both guessing as they race to stop a terrifying international crisis before it's too late.