Enter the world of the 'heavies' - the team behind the huge machines that are challenged with carrying out the biggest lifts of all.
In the millionaire's playground of Poole Harbour they are tasked with lifting a luxury yacht safely into dry dock. At the former Olympic Park technical problems threaten to throw the dismantling of the Aquatic Centre into disarray. Yet the biggest challenge of all comes when a freight train derails and the crane riggers Dave and Lea put their bodies on the line to ensure it is safely lifted from the track.
Away from the cranes, there is no let-up in the demands on the heavies team. Life on the road often means sleeping in and eating in their vans, conditions which see crane driver Tristam complaining to management - and new recruit Wayne struggling to deal with life 200 miles away from his family.