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 is ready for the big tractor pull contest at the county fair, but when Big Deke, the reigning champion, shows up, Tractor Mac realizes just how tough the competition is going to be. Big Deke wins the tractor pull and Tractor Mac is disappointed. Then the carousel stops working, and Tractor Mac is just the right size to help get the ride going again. Tractor Mac may not have won the pull, but in the end, he saves the day at the fair.

Pete and Paul the pigs love food, especially snacks and sweets. But Tractor Mac knows there is a better way to eat, and that it can even be fun, too: buying food from the farmers' market So Tractor Mac and friends visit the local farmers' market, pick out a variety of fresh fruits and vegetables, and cook up a big, healthy feast.

Tractor Mac loves that he is the only tractor in his farm family. Then one day, his friend Iron Dave the train brings him to a tractor dealership and shows him a whole lot full of big red tractors that look just like him. Are these tractors his real family? Tractor Mac is excited to find a place with so many familiar faces, but sad that he might have to leave the farm to be with them. Then all of the big red tractors in the lot help him to understand that his real home is with the family he's found with the animals and machines at the farm.

When a new red tractor named Daisy joins the team at Stony Meadow Farm, she has trouble adjusting to all of the different chores that must be done. She realizes that she has much to learn. Can she do all of the work on her own? Luckily, Tractor Mac and his friends chop, pull, haul, and drag alongside Daisy until she gets the hang of it. With the help of everyone on the farm, Daisy thinks she will fit right in

When the nights start to get cooler and the corn is ready for picking, it's time for autumn fun at the farm Tractor Mac loves the fall, but he's just too big for the orchard, where he is stuck harvesting apples that Farmer Bill will make into delicious treats. Across the road, Small Fred the tractor is busy with the Pumpkin Picking Festival, but he's just too small to pull all of the people who want to go on a hayride. Working together, Tractor Mac and Small Fred figure out a way to share their chores and share the fun.

Tractor Mac sees Plane Jane swooping across through the clouds, and he wonders what it would be like to be able to give hayrides in the sky. He even talks to birds to try to learn how they fly. Then one day Tractor Mac is driving downhill too fast, his wheels lift off the ground, and he can finally fly But when Tractor Mac has a crash landing, he learns that he is better suited to life on the ground.

Every year, the whole town looks forward to the Christmas tree lighting, but this year, a blizzard has struck. The snow starts to fall more and more heavily, and soon, Tractor Mac and his pals are snowed in at the barn. Farmer Bill and Sibley the horse are supposed to be on their way to the center of town with the tree, but when they get stuck in the blizzard and it looks like the ceremony will have to be called off, Tractor Mac saves them and the whole holiday celebration.

Tractor Mac wakes up eager to start the day. Plow, plant, scoop, mow--there's always a new chore for him and his animal and vehicle friends to do at the farm. When the day is done, he washes up and goes to bed, excited to see what the next day will bring.