Navigating 1,200km of forest roads are a fleet of highly skilled truckers whose job it is to track down the timber stacks, load them using cranes and ferry the valuable cargo to mills north and south of the border. Inside the cabs of Jimmy, Norman and Eric we see what life is like for the kings of the forest roads. With new harvesting sites a constant in Galloway Forest, the Forestry Commission must find 500,000 tonnes of stone to build and maintain roads every year. An explosion is planned at a forest quarry to produce rock for a new road masterminded by forestry engineer Elaine McClymont. But before it can be given the go-ahead environment officer Gareth Ventress needs to check for any pine marten activity in the area. Thankfully for Elaine, specially set-up cameras reveal no activity and the quarry explosion can go ahead. Gareth also goes to a secret location deep within the forest to check a golden eagle feeding station. At the Balloch O'Dee campsite, owner James has double-booked an old byre that he's frantically converting in time for the start of the summer season.