Lady: Lady is the coddled cocker spaniel who, despite her best efforts, falls in love with a dog from the wrong side of the tracks. Raised in the lap of luxury, Lady is thoroughly faithful to her adoring "humans," Jim Dear and Darling, and knows little of the hostile world a dog can face beyond the privilege of the "collar and leash set." But when her owners are on vacation, she's muzzled by their Aunt Sarah and runs away, only to be cornered by a pack of wild street dogs. Out of nowhere, Tramp leaps to her defense, scattering them. The independent charmer sets about showing her that while there's danger in the "outside world," there's also life: a world of adventure where beavers can be conned into removing muzzles and dark alleys can become the site of a romantic dinner. Although she falls head over paws for the handsome mutt, she loves her humans as much as he loves his freedom. If only their two worlds could meet ...

Tramp: Footloose and collar-free, Tramp lives every day as if it were his last. Although he's just one step ahead of the dogcatcher, Tramp is too busy playing with danger to be scared of it. He's that rare breed of dog who wants no master but himself. Living by his wits, he's learned that if you have a little charm and a lot of finesse, the world can be your dinner bowl. As Peg, the faded star of the Dog and Pony Follies, tells Lady in the pound, "You won't believe this, deary, but no matter how tight a jam he's in, that Tramp always finds some way out." The irresistible rogue does have one weakness: the ladies. As the pound dogs put it: "He has an eye for a well-turned paw, he has ... Yah, but he never takes 'em serious ... Ah, but some day he is meeting someone different, some delicate, fragile creature who is giving him a wish to shelter and protect ... Like Miss Park Avenue here, aye matey? ... Could be, but when he does ... under the spell of true love ... the poor chump grows careless ... and it's curtains for Tramp." Indeed, the Tramp has already fallen in love with the winsome Lady, and will risk life and limb more than once for her. The question is, how long will his luck hold out before his cronies' prediction comes true?

AUNT SARAH: Though matronly Aunt Sarah is a pushover for cats, she just won't give a dog an even break. When she takes over the household to baby-sit in Jim Dear and Darling's absence, she shunts Lady from the nursery. When the baby cries from the biddy's over-attentiveness, Lady gets the blame. Soon after, the coddled Siamese cats secretly demolish the living room and again she figures it to be that dog's fault. Not unlike a cat, she is obstinate, self-centered, and set in her ways. Indeed, her answer to the "Lady problem" is to have her muzzled. But like so many narrow-minded types, her own misconceptions finally become her undoing. For the muzzling touches off a course of events that leaves the baby unprotected when the home will need Lady the most.

SI AND AM: Twin Siamese cats, Si and Am prowl in harmony, wreaking havoc all around them. Cunning and spiteful, they display the worst traits of their species. When Aunt Sarah arrives in Lady's peaceful home to baby-sit the newborn, Si and Am pop out of her basket to slink by Lady, singing a warning of sorts: "We are Siamese if you please. We are Siamese if you don't please. Now we looking over our new domicile. If we like, we stay for maybe quite a while." As they vandalize the place, terrorizing the pet goldfish and canary, Lady is helpless to stop the chaos. As they proceed upstairs to steal the baby's milk, Lady takes the offensive, barring their way with a fearsome growl. But, too devious for the innocent Lady, they end up framing her for all of their destruction. As much their "patsy" as Lady herself, Aunt Sarah carries them off exclaiming, "Oh, that wicked animal -- attacking my poor innocent little angels."