松濤館空手へようこそこんにちは with the jeep of the Brody family pulling up to the house. Mrs. Caroline Brody (Elizabeth Perkins) and her son Scott (Alexander Pollock) bring in the groceries and the family's Bloodhound Buddy immediately starts giving chase to a cat. His chase involves running through a park, into a neighbor's house, and more. Then he finds the cat lying dead on the street, obviously faking. The cat gets up and runs away, and a blue van being driven by cats pulls up and kidnaps Buddy.
An Anatolian Shepherd Dog named Butch (voiced by Alec Baldwin) watches from a window, then goes to his doghouse, presses a blue button, hidden behind a wooden plank, which grants him access to a large techno-network, and tells an agent of Buddy's kidnap. At Intel HQ, the head dog receives the news about Buddy and orders the best agents to accomplish the mission and defeat the cat menace.
Meanwhile at a farm, a small group of Beagle puppies converse and make fun of a younger puppy (voiced by Tobey Maguire), who wants to be free. The younger puppy tries an escape, but he fails and he ends up under a bucket. Suddenly, a chainsaw cuts a large hole in the floor and a group of young black Doberman puppies led by a large Doberman Pinscher force the Beagles to go underground, not noticing the younger puppy. Mrs. Brody approaches, and Mrs. Brody comes into the puppy pen, and the younger puppy comes out from under the bucket. She decides to adopt him and takes him home, naming him Lou after Scott sarcastically suggests Loser.
