After everyone's favorite St. Bernard gets fired from a movie, Beethoven begins the long journey home with his trainer, Eddie. On their way, they become stranded in a small coastal town where the beloved canine befriends a young boy who is searching for buried treasure.

FBI agent Audrey Parker arrives in the small town of Haven, Maine to solve a murder and soon discovers the town's many secrets—which also hold the key to unlocking the mysteries of her lost past.