After Captain Brown leaves she is overcome with melancoly and dresses up in one of her beautiful old ball gowns and does her hair in ringlets just as she used to, to prove to her sister and herself that she isn't as changed as he seemed to think. While this is going on, he suddenly returns to again ask them to the ball. Startled, he again does not recognize Pheobe, so they hurridly introduce her as 'Miss Livy', their neice who is visiting. Captain Brown seems infatuated by her beauty, and determined to have her revenge, Pheobe accompanies him to the ball, assuming the character of Miss Livy, a thoughtless, flirtatious, and merry young thing, and plans to spurn Captain Brown as 'too old' if given the opportunity....
Things get more hilarous and chaotic as 'Miss Livy' gains numerous admirers in a whirl of social activity, while Brown is left fuming in the shadows, and the sisters have to work hard to keep the local gossips from finding out that Miss Livy and Miss Pheobe are the same person. Pheobe can't decide whether to be flattered that Brown still finds her beautiful in her disguise, or to be insulted that he seems to be suddenly enamoured of the reckless Miss Livy.
Things eventually work out in the end, as Captain Brown rejects Miss Livy as a heartless flirt, and returns to propose to Miss Pheobe, where he finds out all and both forgive each other for the past.
'Quality Street' is actually a stage-play from 1901 by J.M. Barrie!