In this double-agent counter-espionage thriller, Boris Karloff, as the suspicious butler Valdar, is the key to unlocking the identity of the Strendler, the master German spy. Margaret Lindsay ( star of Anne of Seven Gables) plays opposite Karloff as a German agent who is given the password “Always forward” and “Never Backward” to identify herself to fellow agents. Is she working for the Germans or is she a counter-agent working for the British? And is Boris Karloff’s Valdar a German spy or a double agent? Or could he be Strendler? The twists and turns of this spy thriller make this a most challenging and rewarding film to watch!