The seven of them rode the dinghy back to Event Horizon's finance division offices, stealing quietly across the Nene's scummy water, making good headway against the outgoing tide. City noises thrummed around them; sirens, horns, the trill of gas-powered traffic, peals of jukebox music from riverside pubs. The sough of the dinghy's electric outboard was lost without trace.

Des dodged the big freighters anchored in the middle of the river outside the port. They were waiting for the early-morning tide to provide the draught they needed to take them down the channel to the Wash. Rust-streaked metal giants, sprinkled with tiny navigation lights, their bows a check pattern of hoarfrost where their liquefied gas tanks nestled against the hull. Greg could hear a steady plop plop plop as chunks of the mushy rime fell into the water.

Once the freighters were left behind it was a straight ride up the Nene to the Ferry Meadows estuary. The Trinities loosened up, schoolboys returning from a day outing. Their hive-buzz chatter percolated about the inflatable—Minim crewmen I have zapped.

Des even had a beacon to aim at. Philip Evans had chosen to celebrate his company's triumphant return to solid land with a thirty-five-metre-high sign perched on top of Event Horizon's finance division offices. Its core was a macramé plait of colourful neon tubes orbited by stylised holographic doodles—expanding geometric graphics, cartoon characters, origami birds, and, at Christmastime, a traditional Santa replete with sledge and reindeer. Monumentally vulgar, but mesmerising at the same time.

The deep-throated gurgling of the tidal turbines grew steadily louder as they drew near the little quay jutting out from the steep concrete embankment below the ugly cuboid building.

Victor Tyo was waiting for them, huddled in a parka against the fresh pre-dawn air rising off the estuary. He offered a gentlemanly hand to Gabriel, then grappled a semiconscious Katerina ashore. She groaned as her bare feet touched the cold concrete.

"Why are her hands tied?" Victor asked reasonably, as Greg stepped ashore and took some of the weight.

"Coz there wasn't enough rope for her fucking neck," Suzi growled out of the dark.

Victor peered down at the inflatable dinghy with its oblique cargo of well-armed hardliners and an underage girl in a revealing gold party frock. "Bloody hell."

Des gunned the throttle and the little craft surged out into the darkness. "See ya, Greg," Suzi called. "And take care of Lady Gee, she's outta this world."

Walshaw and Julia were waiting in a big corner office on the third floor. Rachel Griffith stood outside. It was a monastically simple room; the walls and ceiling were painted a uniform white, contrasting against the all-black fittings. Greg knew it was Walshaw's office without having to be told. An extension of his personality. Comfortable, efficient, and uncluttered. The furniture was unembellished, two chairs in front of a broad desk, a settee against the wall. Honey-yellow louvre bunds shut out a view of what Greg's sense of direction told him would be the estuary. The air was warm and slightly damp; stale, the way it got after people had been breathing it for several hours.

Walshaw was sitting behind the desk when they walked in. Greg was surprised to see the surface covered in little balls of scrunched-up paper.

Julia was rising from the settee, knuckles screwing sleep out of her eyes. She was wearing a V-necked lilac dress with a pleated skin. A tangerine woollen cobweb shawl was drawn around her shoulders.

She allowed herself a rueful grin. "Midnight, he says. It's gone three."

Then Victor Tyo and one of his squad members carried Katerina in between them. She'd begun to hum tunelessly.

Julia stared at her old schoolfriend, humour and toughness leaching from her face. Whatever zombie incarnation she'd been girding herself for, it wasn't a match for the mental-husk reality provided.

Katerina was lowered on to the settee, utterly uninterested in her environment.

Julia sent Greg a silent desperate plea that this was some awful nightmare, not real.

Walshaw frowned disapprovingly at the grubby rope wrapped round Katerina's wrists. Greg pointed to the fresh scratches on his face.

"See if you can find some padded cuffs," Walshaw told Victor. "And tell Dr. Taylor to stand by. She'll probably need sedating."

Victor nodded crisply and departed, happy to be out of the office.

Julia sank down on to the settee, peering timidly at the beautiful empty shell slumped quiescently beside her. "Kats? Kats, it's me, Julia. Julie. Can you hear me, Kats? Please, Kats. Please."

Katerina's lost eyes swam round. "Julie," she sighed inanely. "Julie. Never thought it would be you. They bring so many others for me, but never you. It's late, isn't it? I can feel it. It's always late when they come for me. We'll be good, won't we, Julie? You and I, when he watches? If we're good then I can go to him afterwards."

"Yah," Julia stammered. Her eyes had begun to brim with tears. "Yah, Kats, we'll be good. The best. Promise." She pulled her shawl off and tucked it clumsily around her friend's trembling shoulders. "I'd like you to leave us alone now," she said without looking round.

Greg had known some officers who could speak like that. Commanding instant obedience. Rank had nothing to do with it, their voice plugged directly into the nervous system.

As he left the office he saw Julia tenderly smoothing back Katerina's dishevelled tresses.

The corridor was narrow with a high ceiling, built from composite panels which cut up the original open-plan floor into a compartmented maze. A pink-tinged biolum strip ran overhead, its unremitting luminescence showing up the threadbare rut running down the centre of the chestnut carpet squares.

Walshaw closed the door behind him. Rachel moved down towards the lift, giving them a degree of privacy.

"I've been doing some checking this afternoon," Walshaw said. "There's a clinic on Granada which claims it can cure phyltre addiction."

"Successfully?" Greg asked.

"Forty per cent of the patients recover. I was wondering. Miss Thompson, isn't it?"

Gabriel was resting with her back flat on the wall, head tilted back, eyes closed, her breathing shallow. Greg recognised the state, he'd seen it in the mirror often enough. That relentless enervation which siphoned the vitality out of every cell.

"Morgan, to someone of your age and ex-rank I'm Gabriel, OK? But no, I can't tell if it works with Katerina. That's too far into the future."

"I don't think Julia will give up," Greg said. "Not now."

"No, I don't suppose she will," Walshaw agreed.

"You know Kendric di Girolamo is going to have to be eliminated, don't you?" Greg said.

Walshaw reached up languidly and began massaging his neck. "Eventually, yes."

"No. Not eventually. You've seen what he's done to that girl; and that was just for fun. The guy's an absolute loon. Tell you, I've seen inside his mind. Homicidal psychopath isn't the half of it. Julia needs head of state level protection while he's on the loose, no messing."

"Julia has been badgering me to do the same thing. She is even more intent than you, if anything."

"Hardly surprising, after what she went through with Kendric. Paedophile shit."

Walshaw turned his head very slowly until he was staring directly at Greg. "What?"

"Kendric and Julia; he seduced her. You didn't know?"

"She hates Kendric."

"Not always," Greg said. He couldn't ever remember seeing Walshaw so thrown before, not even the blitz and the possibility of a leak in the giga-conductor project had upset him this much. Another of Julia's secret admirers.

"So that's what is behind this sudden urge for blood," Walshaw said tightly.