To assist in capturing Nazis, U.S. government operative T.R. Devlin enlists Alicia Huberman, the American offspring of a condemned German war criminal, to serve as a spy. As their attraction deepens, Alicia is tasked with ingratiating herself with Alexander Sebastian, a Nazi who has taken refuge in Brazil. As Sebastian's feelings for Alicia intensify, the tension escalates, forcing Devlin to grapple with the risks of her deepening infiltration into Sebastian's world.