Lady is a pampered Cocker Spaniel who lives in the ritzy part of town. Everything is great until Jim Dear and Darling, Lady's owners have a baby. Then Aunt Sarah and her two scheming Siamese cats come to stay. Lady is thought to be vicious and is muzzled and put outside. Tramp comes to her rescue. Lady runs away with him only to be caught by the dogcatcher. See ending for the rest of the details.