Willie Mason is impressed by the wedding of his big brother, Jack Mason. The junior members of the household mischievously "took in" some preliminaries of the courtship. Katie and Willie proceed to imitate the doings of the big brother and sister, and deserting the playroom, agree to go the staid conventional older ones better by "eloping." Willie aids Katie to escape from the parental roof via the window and ladder. They go to a bakery and buy buns for their trip and then go to the park. About this time the family get home and find a note printed from Willie that states he and Katie are going to get married like Jack and Edith. A call to the police station brings a good natured policeman, who recalls children of the description dining in the park. Eventually the precious pair of infants are found asleep in the railway station and restored to the arms of their anxious parents.
