A studious-looking old fogey becomes alarmed by a newspaper announcement to the effect that a deadly microbe which spread influenza is loose in the air, and that there are already several hundred victims. He becomes terror-stricken, and runs straight to a chemist’s where upon his inquiry they sell him a liquid which must be administered through an atomizer. This he takes, and sets forth on a crusade against influenza. He only succeeds, however, in making a universal nuisance of himself, spraying the contents of his bottle on everybody whom he meets. He comes to grief in one instance when one of his victims dumps him into a filled water trough, giving him a thorough ducking. In another place he tries his charity upon a workman who is emerging from a manhole, and receives a beating. All of his victims join in a chase, and upon capturing him turn him over to the police; even there he tries his atomizer, but the mob sets upon him and avenges themselves summarily. The last scene shows him in the hands of the police, two officers placing him under a shower bath, and they add to the surety of their work by turning a strong stream upon him from a hose.