To regain her sense of smell and get back her lover, a detective joins forces with a perfume maker who uses deadly methods to create the perfect scent.

At the tense 1938 Munich Conference, former friends who now work for opposing governments become reluctant spies racing to expose a Nazi secret.

When a singer is found murdered, with her scent glands excised from her body, detectives probe a group of friends who attended boarding school with her.

In 1942, an intelligence officer in North Africa encounters a female French Resistance fighter on a deadly mission behind enemy lines. When they reunite in London, their relationship is tested by the pressures of war.

As a CIA officer, Evelyn Salt swore an oath to duty, honor and country. Her loyalty will be tested when a defector accuses her of being a Russian spy. Salt goes on the run, using all her skills and years of experience as a covert operative to elude capture. Salt's efforts to prove her innocence only serve to cast doubt on her motives, as the hunt to uncover the truth behind her identity continues and the question remains: "Who is Salt?"