A propagandistic melodrama recounting the dangers and horrors of venereal disease.

A jealous husband arrives in the office of Hawkshaw, a private detective. The husband is certain that his wife is being unfaithful, and he wants the detective to produce photographic evidence. The detective tails the wife, and thinks he has caught her, but a sudden mishap prevents him from getting a photo. Despite this and further setbacks, the dedicated detective presses on, determined to fulfill his assignment.