Pearl, the girl detective, is at home chafing with inactivity and the want of something to do. She decides to go out for a walk in the hope that something in the way of an adventure may come her way. Fred Hanley, a young man, has become a confirmed drunkard. A friend of his brings a doctor to visit Hanley. Hanley becomes excited during their visit and frightens them nearly unto death by shooting at them with a revolver. They leave in haste, but decide to lock Hanley in his room. This they do, leaving a servant to watch the door. Hanley, crazed for want of drink, writes a note that he is wrongfully imprisoned, and offers $5,000 reward for anyone who liberates him. This he throws out the window, just as Pearl is passing the house. She picks it up, reads it and realizes that her quest for an adventure has borne fruit. She immediately goes home and disguises as a boy. Coming back, she applies for a job and the woman downstairs employs her and puts the supposed boy to work. Pearl has a hard time of it, peeling potatoes and scrubbing floors, but with never a chance to liberate the unfortunate, supposed prisoner. Later, however, she is caught upstairs listening at the door by the servant, and is kicked downstairs. The woman pulls her ears for leaving the kitchen, and all in all, Pearl is treated exactly how a real detective should not be. However, at last, Pearl succeeds in gaining access to the room and is fondly dreaming of the five thousand dollar reward and her noble work and bravery, when Hanley’s friends enter and explain. Pearl appreciates that she has been stung and beats a hasty retreat, resolving to detect in a more profitable way in the hereafter.