An unexpected business meeting prevents Brown from attending a Tango Dansante at Harmony Hall, with his wife, and she. greatly disappointed, goes to her mother's for the night, leaving the house in care of Mary Jane, the maid. Percy, the grocer's clerk, calls on Mary Jane, his sweetheart, and is royally entertained by her at the Brown's expense. She finds the tango tickets and dresses up in her mistress's clothes, while Percy gets into Mr. Brown's dress-suit. They then go to the Dansante, where their comical appearance causes much amusement. Meanwhile, Mr. Brown finds he will be able to attend the dance after all, and so 'phones his wife. They find the house in awful shape, their evening clothes and tickets gone. They get a policeman and at the dance hall Brown goes in alone to look for Jane. He finds the pair drinking punch. Percy sees him coming and beats it, but is caught by Mrs. Brown and the policeman. Mary Jane, light-headed from the punch greets Brown affectionately and makes him drink some. Mrs. Brown arrives and finds her hubby and Mary Jane sitting close together, drinking from the same glass. She berates him and all are taken to court. There Brown accuses Percy of stealing his dress-suit and the young man is fined. With no money, he is about to be jailed when Mary Jane gives her last cent to liberate. Brown is taken home by his indignant wife, and poor Mary Jane, with no money, no position and scorned by Percy, feels her "entertainment" has proven a pretty costly affair.
