Driven by destitution in war-torn Berlin, a beguiling woman is cornered into accepting a precarious role in espionage to keep from being thrown out on the street. As Geli Straub becomes the seductive Mlle. Simone Miroux, on orders to discover whether SS officer Kurt Langsdorff is all he seems to be, her plot to betray him falters on conflicted feelings. Drawn past the point of no return into his life, she cannot sell him out. How, then, is she to save him without shedding the identity of the woman who deceived him, and on whom her life depends?