Robert Carter hesitated, pushed open the front door and, after taking a deep inward breath, stepped into the house. Sian Davies, his assistant, followed close behind, her pad in hand, pen poised to take down notes and to keep an accurate record of events as they unfolded. Both of them were certain events would unfold.

Carter carried a small device, holding it out in front of him, sweeping the air in broad strokes, like a warrior brandishing his sword. The device looked very much like a photographer’s light meter. It was no more than three inches square and an inch deep. On one end was a small white dome, on the front a dial with calibrations from one to one thousand. But while a photographer’s meter measured light, Carter’s machine could detect the slightest changes, the tiniest fluctuations, in magnetic fields. Perfect for suspected hauntings.

Carter was thirty-five, tall and slim with an athletic physique he owed to the four hours a week he spent at the gym, combined with regular games of squash and racquets. The exercise was complemented by a healthy diet, apart from far too many cigarettes, a light intake of alcohol, and occasional sex with willing partners.

Sian Davies had none of these attributes, and none of the virtues of a healthy lifestyle. She was short, dumpy, with spiky black hair and a small tattoo of a rose on her shoulder. And she had a crush on Robert Carter the size of a small country. Yet despite their close working relationship, Carter was a total mystery to her. There were rumors of a great love affair — some forbidden passion that had ended and left Carter a scarred, emotional wreck. Some of the rumors had even linked him with Jane Talbot, Department 18’s brightest star, but Sian was not sure she set much store by them. She liked and respected Jane Talbot — aspiring in her own small way to be like her — and she knew Jane was happily married.