Bay and Dodger, accompanied by their master, ten-year-old Jake, go to a friend's, Lenny's, house for a play day with Meatloaf, Lenny's new English Bulldog puppy. They are left alone in the backyard and decide to go explore an old manor in the nearby neighborhood. They discover a broken window, go in, and are confronted by Winnie, a Scottish Sheltie, protecting the manor and its owner. Making friends with Winne, they discover the sheltie's owner is ill and needs help. It's up to Bay to figure out how and where to get help without panicking his friends. He must learn how to gain trust from, make decisions for, and organize the motely dog-pack.