Carol followed Larry Gandle, the British Europol Liaison Officer who had picked her up at the airport, through the corridors of Europol headquarters on the Raamweg. With his sharp suit and his cropped, thinning hair, he looked more like a financial services salesman than a police officer. But there was something indefinable that marked him out as English, something beyond his nasal Black Country accent.

He led her to a small conference room on the third floor of the main building. The only window looked out on to a central courtyard, allowing no possibility of being seen from the outside world. As Carol settled herself at one corner of the long bleached wood table, the door opened and a tall, rangy dark-haired woman walked in. She had the loose-limbed stride of an athlete at home in her body. Dressed casually in black jeans, a charcoal sweater and a creased leather jacket, a black satchel promoting the Berlin Film Festival slung over her shoulder, she looked more like a TV producer than a cop. Her hair was cut short and fashionably tousled with wax. She had a triangular face, broad across the forehead and narrowing to a pointed chin beneath a thin-lipped mouth. She looked unnervingly severe until she smiled a greeting, her blue eyes crinkling at the corners and promising compromises her expression in repose flatly denied. ‘Hi,’ she said. ‘I’m Petra Becker.’ She crossed the room, ignoring Gandle and making straight for Carol. ‘You must be Carol Jordan.’ She spoke English with a transatlantic hint overlaying her slight German accent.

Petra held out a hand to Carol, who stood up and shook it. ‘Pleased to meet you. This is Larry Gandle, one of the British ELOs.’

Petra nodded acknowledgement and pulled out the chair nearest Carol, so they were sitting at ninety degrees to each other. Gandle was immediately shut out of their communion, though he didn’t realize it. He sat down opposite Carol, a large expanse of table separating them. ‘Nice to meet you, Petra,’ Gandle said with an air of condescension. ‘I’m here purely to facilitate this meeting, to answer any questions that might come up that fall into our remit. But essentially, this is a joint operation between the British and the Germans, and it’s up to you two to run it in a way that works best for you.’