Craig Lebeau and his team are pushed to the limit when their main driver gets stuck in a serious accident with a fully loaded truck. They wonder if the money is worth the risks.

When Craig's little brother Brent cuts corners to get extra wood off the mountain, a mistake shuts the entire operation down. With the business hanging in the balance, Craig needs to decide if he can bail Brent out.

Craig's newest driver must prove himself on Mud Mountain; facing ice, muck and massive pressure, Theron tries to stay ahead of the fleet, only to be stopped by someone else's mistake.

Things go south when Craig's brother Brent borrows a logging machine, leading to a risky mountainside recovery. Veteran log hauler Dan Millar battles rough roads and torn up tyres to make it to the mill.

Trouble on the traction line leaves Craig with endless breakdowns. A driver fights a chronic back injury to keep the trucks moving and a log hauler goes off the road forcing an all-night rescue.

An early spring thaw turns a road building project on a mountain cutblock into a muddy battle for Brent and Taylor. Craig locks horns with his son-in-law over a mechanical breakdown.