Zach has taken pity on Lenny, a stray, scruffy dog who looks even more fed up than he does. But this is no ordinary mutt! Zach thinks that he has gone barking mad when the dog starts talking to him. Lenny then explains that an eccentric scientist, has zapped him with a microchip that gives him the ability to talk to humans. But a bunch of thugs are out to capture the magical mutt. Only Lenny the Wonder Dog can show them that actions speak louder than words and with a little help from their friends, Zach and Lenny embark on a mission to outwit their enemies.