Skid, the littlest yellow tractor in the equipment yard, wants to be mighty like the giant bulldozers, tall cranes, and massive diggers who tower over him. But all the big machines tell him he is just a dinky tractor with a putt-putt engine. While they are busy building a new road through the mountain, Skid is left behind to take out the garbage.
When disaster strikes and a tunnel the machines are digging collapses, Pillar, the biggest bulldozer, is left trapped in the rubble. Only a small opening is left at the tunnel entrance and the only one who can fit through the opening is Skid - who is afraid of the dark.
Now it's up to the tiniest tractor to save the day. Can Skid find the courage to do what he was made to do and prove that he doesn't have to be big to be mighty?
Be strong and courageous. Do not be afraid or terrified because of them, for the LORD your God goes with you; he will never leave you nor forsake you. Deuteronomy 31: 6 (NIV)