Cyril is deeply in love with Florrie. The young girl's mama, however, is not inclined to favor the match and their meetings, in consequence, are clandestine. Cyril sends a note to his lady love inviting her to attend a fancy dress ball, but the missive falls into the hands of Florrie's mama, who decides to attend the ball without her daughter's knowledge. About this time Cyril's uncle, Joe, who is a jolly old sort, enters the apartment of his nephew and finding a fancy masquerade costume on the couch, decides to appropriate the same in revenge for some little joke played upon him by Cyril. Florrie's ma and Uncle Joe meet at the ball and when the time arrives for unmasking, they recognize each other and an old love affair is renewed. Mama is a widow and Uncle Joe is a bachelor. The evening is enjoyably spent, but Cyril and his sweetheart are unable to attend because of Uncle Joe's sly action in appropriating his nephew's fancy dress costume. On the following morning the uncle is discovered on a couch in Cyril's apartments clad as a knight of old. At first the young man is inclined to have revenge, but upon second thought he decides to wait. At a fashionable café uncle and mama keep their first rendezvous and it so happens that Cyril and Florrie are partaking of refreshments in an adjoining booth. The sounds of merriment attract the attention of both parties and after much peering over the partition, Uncle Joe and mama and Cyril and Florrie decide to make it a one-party affair. The partition is removed and the two generations of lovers make merry while pledging their individual good health for the future.