When Richard Hannay finds the corpse of freelance spy Franklin P. Scudder in his London flat, he goes on the run, fearing that his life is in danger. Scudder had previously revealed that he was investigating a ring of German spies, who were conspiring to sabotage Britain's war capability. Hannay becomes both hunter and hunted as he struggles to unravel the tangled threads of this plot while staying one step ahead of his pursuers, who will stop at nothing to keep their nefarious secrets.