Sibley the horse lives on Stony Meadow Farm and is a hard worker the whole year round. Then Tractor Mac arrives at the farm, and suddenly, everything that Sibley used to do, Tractor Mac does, too. Sibley wonders if there is any room left for him -- but when Farmer Bill and Tractor Mac get stuck in a soggy field, Sibley is the one who comes to their rescue, and Sibley and Tractor Mac learn that there's plenty for both of them to do at the farm.

Tractor Mac wishes he could work at the pumpkin patch instead of the apple orchard.

Tractor Mac competes in a tractor pulling contest and discovers being a winner involves doesn't always mean coming in first place.

In Stoney Meadow Farm, Fergus the calf does not like change and misses summer's flowers and shade trees until Tractor Mac helps him to appreciate the changes autumn brings, such as colorful leaves, pumpkin festivals, and apples.

"Tractor Mac meets other big red tractors who look just like him and learns the true meaning of family"--

When building a community swimming pond, Tractor Mac and his friends on the farm discover that teamwork makes all the difference.

Tractor Mac and his friends welcome a new vehicle to the farm, a small tractor named Daisy, helping her get started on her difficult work and encouraging her to keep at it, one small step at a time.

Little Green is a proud and strong pickup truck who loves helping with chores, but when Farmer Gray buys a big new blue truck, Little Green is left to rust in a pasture until the farmer's daughter, Fern, suggests they fix him up and use him for such gentle jobs as going to the farmers' market.