Silvia Broome (NICOLE KIDMAN) is an African-born translator who works at the United Nations translating foreign languages into English. When she returns one night to collect her belongings from her office, she overhears whispers on the main floor that seem to point to a pending assassination attempt of Edmund Zuwanie (EARL CAMERON), the ruler of the African country of Matobo.
Considering that the controversial leader is scheduled to address the U.N. regarding his rule and allegations of genocide, Secret Service agents Tobin Keller (SEAN PENN) and Dot Woods (CATHERINE KEENER) of the agency's Dignitary Protection division are called in to investigate. Both are good at their jobs, and despite Tobin having to deal with his estranged wife's unexpected death two weeks earlier, he tries to get to the bottom of the truth.
With Zuwanie's head of security, Nils Lud (JESPER CHRISTENSEN), anxiously awaiting any word on their investigation, Tobin and Dot try to discern what Silvia's motives, if any, might be. Since she's one of the few people around who speaks the leader's native dialect, Tobin wants to rule out sheer coincidence that she would be in the right place at the right time to overhear such plans.
As he and the other agents dig deeper into Silvia's past, they come up with unexpected discoveries. From that point on, they try to figure out if she's just an innocent bystander who's now in danger of being killed herself or perhaps is somehow involved in the plot, all while preparing for Zuwanie's visit to the U.N.