The Interpreter (2005)

Silvia Broome (Nicole Kidman), a citizen of an African nation, works as an interpreter at the United Nations. During an emergency, the U.N. is evacuated. When Silvia returns after hours to pick up her belongings, she happens to overhear a plot to assassinate an African head of state. Tobin Keller (Sean Penn) is an F.B.I. agent assigned to investigate. Although Silvia is hunted by the would-be assassins, Agent Keller suspects she may somehow be involved in the conspiracy.