British Intelligence

During World War I, Franz Strendler has cost Britain dearly. In desperation, British intelligence dispatches their best agent, Frank Bennett, to Germany to bring the spy in. The mission is high risk and fraught with danger as the two sides play a deadly cat-and-mouse game.

Bennett is sent to pick up Strendler, but the Germans are forewarned and he is shot down. He survives the crash and is rescued by friendly soldiers. The mission shifts from ambush to survival and recovery.

While recovering in a hospital, Bennett is tended by Helene Von Lorbeer. He confesses love, only to learn she plans to leave and they may never meet again. After he dozes, Helene steals a kiss on his cheek, complicating her loyalties.

Helene Von Lorbeer is recalled to Germany to receive a high honor personally from the Kaiser and to begin a new mission. The assignment soon pulls her back into espionage as she prepares to infiltrate Britain. Her path from nurse to spy is set in motion.

Posing as Frances Hawtrey, a refugee, she infiltrates the London household of Arthur Bennett, the cabinet minister and Frank's father. Hawtrey answers to Valdar, the appointed intermediary who reports to Colonel Yeats. The deception helps her slip into influential circles in London.

Bennett's secretary, also a German spy, taps out a secret message on her typewriter. Yeats recognizes the code, proving Hawtrey is indeed embedded in the Bennett household. A trap is set to expose the spy in their midst.

A captured spy named Kurz seems to escape and flees to Hawtrey's bedroom, where she hides him in a closet. When Yeats and his men arrive, Hawtrey betrays Kurz, revealing she knew the man was an imposter. The ruse helps validate her loyalty to the British cause.

Bennett unexpectedly returns as his squadron is recalled. He is surprised to see Hawtrey living under a false identity and, through conversation, learns she is loyal to the British. Valdar overhears the exchange, tightening the net around the spy ring.

The British cabinet gathers at Bennett’s home, and Valdar uses the moment to force Hawtrey into the cellar. He has set a bomb to blow the house during a Zeppelin raid, using the moment to his advantage. Hawtrey claims she had to invent a cover story to calm Frank's suspicions.

Convinced by the Kaiser award and Hawtrey’s testimony, Valdar finally reveals his true identity as Franz Strendler. His revelation confirms the extent of the German spy network within Britain. Hawtrey’s loyalty remains crucial as the trap tightens around him.

Hawtrey unlocks the cellar door and informs Yeats that the bomb is in place. She also reveals that she is a British double agent, complicating Valdar’s plans and offering a crucial advantage to Yeats. The bomb threat becomes a direct countermeasure against Strendler’s operation.

Valdar slips out through the coal chute into a hidden hideout, attempting to transmit the stolen British spring offensive plans. He is pursued by British agents who aim to cut off his transmission. The chase intensifies as the clock ticks toward a potential catastrophe.

In a grim twist of fate, a Zeppelin bombs Valdar's hideout and kills him and his confederates before they can send the plans. The mission collapses in a swirl of tragedy, but the British gains from Hawtrey’s double-agent status and Valdar's demise. The film closes on the cost of deception in war.