Mike is determined to make a quick-and-easy money-maker out of a 1955 Bel Air wagon from his personal collection, but Cassidy and the crew have other plans. Meanwhile, Avery buys a rare truck from Big Donny, and embarks on an ambitious build that puts his mechanic skills, and his relationship with Shafin, to the test.

While Avery struggles to save his business, Mike is determined to end the year on a high note with a build for an old friend. But old secrets and conflicts with Connor get in his way.