When Aunt Sarah moves in with her devious felines Si and Am to baby-sit, the very protective Lady soon finds herself being fitted for the unthinkable - a muzzle! In her bid for freedom, she meets and is charmed by Tramp, a dog-about-town. Together with friends Jock, Trusty and Peg, they share thrilling adventures on a lovely bella notte as Lady learns what it means to be a footloose and leash-free.