Miss Lorimer, a clever Secret Service operative of the United States Government, is detailed to hunt down the plans of a band of conspirators plotting a South American revolution. By assuming deafness, her weakness becomes known, as she is a familiar patron at a café frequented by the revolutionists. Accustomed to her presence and familiar with her failing, they talk freely and she is enabled to overhear their plans. She next trails them to their headquarters and spies upon them through a skylight. However, she is not as clever at porch-climbing as she is in the restaurant; they discover her and make her a prisoner. She is then forced to meet a severe ordeal, the second degree, in the attempt to make her betray her sense of hearing. Failing in this, they bind her and leave her in the deserted house. Webster, a keen reporter, gets “a line on this case” about the same time as the Secret Service operative, and also traces the conspirators to their headquarters. The place seems deserted, but he happens to look up at a heavily blinded window just in time. Miss Lorimer has freed herself from her bonds to find herself imprisoned behind locked doors and barred windows. She takes off her stocking, unravels it, and lets a note down by it from the window. It is this that attracts reporter Webster’s attention. He sees it and a few moments later she is rescued. The two unaided, then follow their quarry and capture the filibusters as they are about to sail away with a shipload of ammunition. Having done their duty to their superiors they find that Cupid has the call and they plight their troth.