"I don't think so."

"Theft of anything in particular?"

"Maybe but it's mostly vandalism, I'd say."

"What're their shoe treads like?" Rhyme asked.

"All smooth."

"Stylish bastards," he muttered.

He was, she knew, hoping for some dirt or fibers that might lead them to the Ghost's safehouse but, while the gullies in deep-tread-soled shoes can retain such evidence for months, smooth-soled shoes lose trace far more quickly.

"Okay, Sachs, keep going. What do the footprints tell you?"

"I'm thinking that -"

"Don't think, Sachs. That's not the way to understand a crime scene. You know that. You have to feel it."

His seductive, low voice was hypnotizing and with each word he spoke she felt herself uneasily being transported back to the crime itself, as if she were a participant. Her palms began to sweat copiously in the latex gloves.

"He's there. Jerry Tang is at his desk and they -"

"'We,'" Rhyme corrected sternly. "You're the Ghost, remember."

"- we kick the door in. He gets up and runs toward the back door but we get him and drag him back to his chair."

"Let's narrow it down, Sachs. You're the snakehead. You've found the man who's betrayed you. What are you going to do?"

"I'm going to kill him."

I saw crow on road picking at food. Another crow tried steal it and first crow not just scare other away – he chase and try to peck eyes out.

Suddenly she was filled with a burst of unfocused anger. It nearly took her breath away. "No, wait, Rhyme. It's like his death is secondary. What I really want is to hurt him. I've been betrayed and I want to hurt him bad."

"What do you do? Exactly."

She hesitated, sweating hard in the hot suit. Several places on her body itched at once. She felt like ripping a hole in the suit to scratch her skin.

"I can't -"

"'I', Sachs. Who's 'I'? You're the Ghost, remember?"

Solidly in her own persona, though, she said, "I'm having trouble with this one, Rhyme. There's something about him, about the Ghost. He's way on the other side." She hesitated. "It feels really bad there."

A place where families die, where children are trapped in the holds of sinking ships, where men and women are shot in the back scrabbling for the only sanctuary they can find: a heartless, cold ocean. A place where they die for no reason other than that they are irritations and stumbling blocks.

Sachs stared at the ever-open eyes of Jerry Tang.

"Go there, Sachs," Rhyme murmured. "Go on. I'll get you back. Don't worry."

She wished she could believe him.

The criminalist continued, "You've found your betrayer. You're furious with him. What do you do?"

"The other three men with me tie Tang to a chair and we use knives or razors on him. He's terrified, screaming… We're taking our time. All around me – there're bits of flesh. What looks like part of an ear, strips of skin. We cut his eyelids off…" She hesitated. "But I don't see any clues, Rhyme. Nothing that'll help us."

"But there are clues there, Sachs. You know there are. Remember Locard."

Edmond Locard was an early French criminalist who stated that at every crime scene there's an evidence exchange between the victim and the perpetrator, or between the scene itself and the perp. It might be difficult to identify the evidence that's been exchanged and harder yet to trace it to its source but, as Rhyme had said dozens of times, a criminalist must ignore the apparent impossibilities of the job.

"Keep going – further, further… You're the Ghost. You're holding your knife or razor."

Then, suddenly, the phantom anger she felt vanished, replaced by an eerie serenity. This shocking, yet oddly magnetic, sensation filled her. Breathing hard, sweating, she stared at Jerry Tang and was possessed fully by the foul spirit of Kwan Ang, Gui, the Ghost. She did feel what he had experienced – a visceral satisfaction at the sight of his betrayer's pain and slow death.

Gasping, she realized she felt a deep lust to see more, to hear Tang's screams, watch his blood spiral down his shaking limbs…

And with that thought came another: "I'm…"

"What, Sachs?"

"I'm not the one torturing Tang."

"You're not?"

"No. I want the others to do it. So that I can watch. It's more satisfying that way. It's like a porno tape. I want to see everything, hear everything. I don't want to miss a single detail. And I have them cut his eyelids off first so Tang has to watch me watch him." She whispered, "I want it to keep going on and on."

A whisper. "Ah, good, Sachs. And that means there's a place you're watching from?"

"Yes. There's a chair here, facing Tang, about ten feet away from the body." Her voice cracked. "I'm watching," she whispered. "I'm enjoying it." She swallowed and felt sweat pouring from her scalp. "The screams lasted for five, ten minutes. I'm sitting in front of him all that time, enjoying every scream, every drop of blood, every slice." Her breathing was fast now.

"How you doing, Sachs?"

"Okay," she said.

But she wasn't okay at all. She was trapped – in that very place where she didn't want to be. Suddenly everything good in her life was negated and she slipped further into the core of the Ghost's world.

You're looking like it's bad news…

Her hands shook. She was desperate and alone.

You're looking like it's bad -

Stop it! she told herself.

"Sachs?" Rhyme asked.

"I'm fine."

Stop thinking about it, stop thinking about the bits of curled flesh, the smears of blood… Stop thinking about how much you're enjoying his pain.

Then she realized that the criminalist wasn't saying anything.

"Rhyme?"

No answer.

"You okay?" she asked.

"Not really," he finally answered.

"What is it?"

"I don't know… What good does knowing where he sat do us? He was wearing those fucking smooth-soled shoes. It's the only place we know the Ghost himself spent any time but what kind of evidence is there?'

Still feeling nauseous, tainted by the Ghost's spirit within her, she glanced at the chair. But she looked away, unable to concentrate.

Discouraged, angry, he continued, "I can't think."

"I…"

"There's got to be something," he continued. She heard frustration in his voice and she supposed he was wishing he could come down and walk the grid himself.

"I don't know," she said, her voice weak.

She stared at the chair but she saw in her mind the knife working its way up and down Jerry Tang's flesh.

"Hell," Rhyme said, "I don't know either. Is the chair upright?"

"The one the Ghost sat in to watch from? Yes."

"But what do we do with that fact?" His voice was frustrated.

Well, this wasn't like him. Lincoln Rhyme had opinions about everything. And why was he sounding as if he'd failed? His tone alarmed her. Was he still brooding over his role in the deaths of the immigrants and crew on the Fuzhou Dragon?

Sachs focused again on the chair, which was covered with debris from the vandalism. She studied it carefully. "I've got an idea. Hold on." She walked closer to the chair and looked beneath it. Her heart thudded with excitement. "There're scuff marks here, Rhyme. The Ghost sat down and leaned forward – to see better. He crossed his feet under the chair."

"And?" Rhyme asked.

"That means that any trace in the seam between the uppers and his soles might've fallen out. I'll vacuum underneath it. If we're lucky we might find something that'll lead us to his front door."

"Excellent, Sachs," Rhyme said. "Get the Dustbuster."

Excited at this find she started for the CS kit near the door to retrieve the vacuum. But then she stopped. She gave a faint laugh. "You got me, Rhyme."