Invitations are sent out to a grand mask-ball to be held at the Metropolitan Dancing Academy, and a feature of the affair is the awarding of a gold medal to the wearer of the best costume. The maid at Smith's house receives an invitation from her sweetheart. This invitation falls into the hands of Smith and, being of a jealous nature, he thinks it is intended for Mrs. Smith. This suspicion leads him into some very embarrassing situations and teaches him a lesson.
—Moving Picture World synopsis