When a big new yellow tractor arrives, Otis the friendly little tractor is cast away behind the barn, but when trouble occurs Otis is the only one who can help.

When the animals and equipment at the farm need more space, Tractor Mac comes to the rescue by helping to build a barn.

Tractor Mac and his animal and vehicle friends wrap gifts, bake holiday treats, decorate a tree, and get ready for Christmas.

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.