Experts Izzie Balmer and Tim Medhurst are cruising around Wales in a classic car, searching for antiques to sell at auction. It's a competition, mind you, so profits are the name of the game. Izzie finds a selection of maps from the days before cars ruled the roads, and Tim gets all excited when he discovers a William Gladstone commemorative medal. With the shopping done, there's time for our experts to learn more about local history as Izzie finds out about a shameful event that took place in Cardiff, while Tim takes a trip to Carmarthen to learn about the poet and scholar who helped save the Welsh language from extinction. All roads point to auction for our duo. Who will reign victorious at the penultimate sale?