Eddie Bob, a struggling animal trainer and widower dad, is an assistant animal trainer to Sal DeMarco, an untalented, egocentric animal show host. Both men have been hired to train the animals for a film called Frizzy, The Bichon Frise: Sal as the dog handler, and Eddie is given only the responsibility of training the lizard. When Frizzy is kidnapped, Sal quickly claims that Eddie was responsible for the dog handling. Eddie is promptly fired. The director refuses to pay the ransom and decides to instead hold auditions for the new Frizzy. Meanwhile, Eddie's son, Billy Bob, is walking around town when he discovers a large, stray dog is following him. Billy then brings the dog home and names him Beethoven after the dog shows interest in Ludwig van Beethoven's 5th symphony, after initially trying to call him Wolfgang. Eddie comes home to discover that, not only is his job gone, but now his house is wrecked by an oversized dog adopted by his son. Beethoven may soon get the break he needs when he is placed as the role in the Frizzy film.