It is longer than a football pitch, weighs 550 tons, and moves at an average of five miles per hour. Its job - and that of company troubleshooter, Neil Mannix - is to move a giant transformer across Nyala, an oil-rich African state. When Nyala erupts into civil war, Mannix finds himself, and the juggernaut, at the centre of the conflict. Can Mannix deliver the transformer to its destination or will warring factions finally halt its progress and destroy it?