Along with their well-behaved girl puppies, Lady and Tramp are busy raising mischievous Scamp, who's always in the doghouse. Longing for freedom, Scamp ventures far from home and meets a lovely, reluctant stray named Angel. She introduces him to the Junkyard Dogs, led by streetwise Buster. When Buster challenges Scamp to the ultimate test of a collar-free life, Scamp finds himself torn between a world of adventure and love for the famiy he's left behind.