Using the door, which was centrally placed in the wall, as a mouth, the artists had sprayed a single, vast head on to the stripped plaster. The painting was more adroit than most she had seen, rife with detail that lent the image an unsettling veracity. The cheekbones jutting through skin the colour of buttermilk; the teeth - sharpened to irregular points - all converging on the door. The sitter's eyes were, owing to the room's low ceiling, set mere inches above the upper lip, but this physical adjustment only lent force to the image, giving the impression that he had thrown his head back. Knotted strands of his hair snaked from his scalp across the ceiling.

Was it a portrait? There was something naggingly specific in the details of the brows and the lines around the wide mouth; in the careful picturing of those vicious teeth. A nightmare certainly: a facsimile, perhaps, of something from a heroin fugue. Whatever its origins, it was potent. Even the illusion of door-as-mouth worked. The short passageway between living-room and bedroom offered a passable throat, with a tattered lamp in lieu of tonsils. Beyond the gullet, the day burned white in the nightmare's belly. The whole effect brought to mind a ghost train painting. The same heroic deformity, the same unashamed intention to scare. And it worked; she stood in the bedroom almost stupified by the picture, its red-rimmed eyes fixing her mercilessly. Tomorrow, she determined, she would come here again, this time with high-speed film and a flash to illuminate the masterwork.

As she prepared to leave the sun went in, and the bands of light faded. She glanced over her shoulder at the boarded windows, and saw for the first time that one four-word slogan had been sprayed on the wall beneath them.

'Sweets to the sweet' it read. She was familiar with the quote, but not with its source. Was it a profession of love? If so, it was an odd location for such an avowal. Despite the mattress in the corner, and the relative privacy of this room, she could not imagine the intended reader of such words ever stepping in here to receive her bouquet.