An unexpected business meeting prevents Brown from attending a Tango Dansante at Harmony Hall with his wife; greatly disappointed, she goes to her mother's for the night, leaving the house in the care of the maid, Mary Jane. Percy, the grocer's clerk and Mary Jane's sweetheart, calls on her and she entertains him royally at the Browns' expense. She finds the tango tickets and dresses up in Mrs. Brown's clothes while Percy dons Mr. Brown's dress-suit. They go to the Dansante, where their comical appearance causes much amusement. Meanwhile, Mr. Brown finds that he will be able to attend the dance after all and phones his wife. They find the house in awful shape and the tickets and their evening clothes gone. They get a policeman and at the dance hall Brown goes in alone to look for Mary Jane. He finds the pair drinking punch. Percy sees him coming and beats it, but Mrs. Brown and the officer catch him. 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 him.. Brown is taken home by his indignant wife, and poor Mary Jane, with no money and no position, and scorned by Percy, feels that her "entertainment" has proven entirely too costly.