Custom builder James West buys Mike's Willys Jeep to create a WWII bomber-themed truck for a client -- but there's a catch. The price of the truck will be determined by the winner of a "Shop Truck Challenge." Egos flare across Rust Valley as the teams prepare for the race.

A Rust Valley road trip steers Mike into the danger zone after Connor gives him an ultimatum: buy another car and Connor will blow up one from the Field of Dreams. Avery's "Deuce-and-a-Half" truck runs into transmission problems that put the budget and everyone's safety at risk.