In 1942, during the height of World War II, Wild Bill Donovan, the director of the United States' first spy agency, believes women are the key to winning the intelligence battle with the Nazis. To that end, he partners fledgling agent Kit Thomas with British MI6 agent Mark Williams and sends them to one of the most perilous places in the world - Massawa, Eritrea - to investigate the theft of millions of military payroll dollars. In Massawa, Kit and Mark discover a conspiracy by Nazi sympathizers, known as the Vichy, to shut down the only Allied naval base on the Red Sea - which is an essential resource in stopping the Nazi invasion of North Africa. As they work to reveal the conspirators, Kit and Mark engage in a dangerous and tempestuous dance of trust versus mistrust.