From both land and water, the place looked like a deserted, rundown boat repair yard. The rotting ribs of a couple of barges and corroded components from old machinery, their former functions a mystery, were all that could be glimpsed through the gaps in the planks of the tall gates. Anyone curious enough to have stopped their car on the quiet back road and peered into the yard would have been satisfied that they were looking at yet another graveyard for a dead communist enterprise.

But there was no apparent reason for anybody to harbour idle curiosity about this particular backwater. The only mystery was why, even in those illogical totalitarian days, it had ever been thought there was any point in opening a business there. There was no significant population centre for a dozen miles in any direction. The few farms that occupied the hinterland had always required more work to make them profitable than their occupants could provide; no spare hands there. When this boatyard was in operation, the workers had been bussed fifteen miles to get to work. Its only advantage was its position on the river, sheltered from the main flow by a long sandbar covered in scrubby bushes and a few straggling trees leaning in the direction of the prevailing wind.

That remained its signal selling point to those who covertly used this evidently decaying example of industrial architecture from the bad old days. For this place was not what it seemed. Far from being a ruin, it was a vital staging post on a journey. If anyone had taken the trouble to give the place a closer look, they would have started to notice incongruities. The perimeter fence, for example, made of sheets of prefabricated reinforced concrete. It was in surprisingly good repair. The razor wire that ran along the top looked far more recent than the fall of communism. Not much to go on, in truth, but clues that were there to be read by those who are fluent in the language of deviousness.

If such a person had mounted surveillance on the apparently deserted boatyard that night, they would have been rewarded. But when the sleek black Mercedes purred along the back road, there were no curious eyes to see. The car halted short of the gates and the driver climbed out, shivering momentarily as cold damp air replaced the climate-controlled environment. He fumbled in the pockets of his leather jacket, coming out with a bunch of keys. It took him a couple of minutes to work his way through the four unfamiliar padlocks, then the gates swung silently open under his touch. He pushed them all the way back, then hurried back to the car and drove inside.