More disturbing was the silence from all the vampires in the room who watched him being led along by Dolly to the hallway. And then there was the sofa full of unmoving humans—subjugates, no doubt, all dazed and slumped, their mouths hanging open, the bruises and wounds on their necks and arms and hands looking quite ugly. The glass table in front of them had a fine coating of white powder and a few razor blades. The only noise was the muted music and a low rumble of thunder outside.

“This way,” Dolly said, taking Magnus by the sleeve.

The hall was dark, and there were clothes and shoes all over the floor. Muffled noises came from the three doors along the hall. Dolly walked right to the end, to a double door. She rapped on this once and pushed it open.

“Go ahead,” she said, still smiling her weird little smile.

In stark contrast to the whiteness of everything in the living room, this room was the dark side of the apartment. The carpet was an indigo black, like a nighttime sea. The walls were covered in deep silver wallpaper. The lamp shades were all covered by gold and silver shawls and throws. The tables were all mirrored, reflecting the view back and forth again. And in the middle of it all was a massive black lacquer bed with black sheets and a heavy gold cover. And on it was Camille, in a peach silk kimono.

And a hundred years seemed to vanish. Magnus felt himself unable to speak for a moment. It might as well have been London again, the whole twentieth century rolled up into a ball and tossed aside.

But then the present moment came crashing back when Camille began an ungainly crawl in his direction, slipping on the satin sheets.

“Magnus! Magnus! Magnus! Come here! Come! Sit down!”

Her silver-blond hair was long and down, looking wild. She patted the end of the bed. This was not the greeting he’d been expecting. This was not the Camille he remembered, or even the one he had seen in passing.

As he made to step over what he thought was a lump of clothing, he realized there was a human on the floor, facedown. He bent down and gently reached into the mass of long black hair to turn the person’s face upward. It was a woman, and there was still some warmth in her, and a faint pulse beating in her neck.

“That’s Sarah,” Camille said, flopping onto the bed and hanging her head off the end to watch.

“You’ve been feeding from her,” Magnus said. “Is she a willing donor?”

“Oh, she loves it. Now, Magnus . . . You look marvelous, by the way. Is that Halston? . . . We’re just about to go out. And you are coming with us.”

She slid from the bed and tripped her way into a massive closet. Magnus heard hangers being scraped along rails. Magnus examined the girl on the floor again. She had punctures all over her neck—and now she was smiling weakly at Magnus and pushing back her hair, offering him a bite.

“I’m not a vampire,” he said, resting her head gently on the floor again. “And you should get out of here. Do you want my help?”

The girl made a sound that was just between a laugh and a whimper.

“Which one of these?” Camille said as she came stumbling back out of the closet, holding two almost identical black evening dresses.

“This girl is weak,” he said. “Camille, you’ve taken too much blood from her. She needs a hospital.”

“She’s fine. Leave her alone. Help me pick a dress.”

Everything about this exchange was wrong. This was not how the reunion should have gone. It should have been coy; it should have had many strange pauses and moments of double meaning. Instead Camille was acting like she’d just seen Magnus yesterday. Like they were simply friends. It was enough of an entry to allow him to get to the point.

“I’m here because there’s a problem, Camille. Your vampires are killing people and leaving bodies on the street. They’re overfeeding.”

“Oh, Magnus.” Camille shook her head. “I may be in charge, but I don’t control them. You have to allow for a certain amount of freedom.”

“This includes killing mundanes and leaving their bodies out on the sidewalk?”

Camille was no longer listening. She had dropped the dresses onto the bed and was picking though a pile of earrings. Meanwhile Sarah was attempting to crawl in Camille’s direction. Without even looking at her, Camille set a mirror full of white powder down on the floor. Sarah went right for it and began sniffing it up.

And then Magnus understood.

While human drugs didn’t quite work on Downworlders, there was no telling what would happen when that drug was run through a human circulatory system and then ingested through the human blood.

It all made sense. The disarray. The confused behavior. The frenzied feeding in the clubs. The fact that they all looked so ill, that their personalities seemed to have changed. He’d seen this a thousand times in mundanes.

Camille was looking at him now, her gaze unwavering.

“Come out with us tonight, Magnus,” she cooed. “You are a man who knows a good time. I am a woman who provides a good time. Come out with us.”

“Camille, you have to stop. You have to know how dangerous this is.”

“It’s not going to kill me, Magnus. That’s quite impossible. And you don’t understand how it feels.”

“The drug can’t kill you, but other things can. If you continue like this, you know there are people out there who can’t let you go on murdering mundanes. Someone will act.”

“Let them try,” she said. “I could take on ten Shadowhunters once I’ve had some of this.”

“It may not be—”

Camille dropped to the floor before he could finish and buried her face into Sarah’s neck. Sarah flailed once and groaned, then became silent and motionless. He heard the sickening sound of the drinking, the sucking. Camille lifted her head, blood all around her mouth, running down her chin.

“Are you coming or not?” she said. “I would simply love to take you to Studio 54. You’ve never had a night out like one of our nights out.”

Magnus had to force himself to keep looking at her like this.

“Let me help you. A few hours, a few days—I could get this out of your system.”

Camille dragged the back of her hand across her mouth, smearing the blood onto her cheek.

“If you’re not coming along, then stay out of our way. Consider this a polite warning, Magnus. Dolly!”

Dolly was already at the door. “Think you’re done here,” she said.

Magnus watched Camille sink her teeth into Sarah again.

“Yes,” he said. “I think I am.”

Outside, a downpour was in progress. The doorman held an umbrella over Magnus’s head and hailed him a cab. The incongruity of the civility downstairs and what he’d seen upstairs was . . .

It wasn’t to be thought about. Magnus got into the cab, gave his destination, and closed his eyes. The rain drummed onto the cab. It felt like the rain was beating directly onto his brain.

Magnus wasn’t surprised to find Lincoln sitting on the steps by his door. Wearily he waved him inside.

“Well?” Lincoln said.

“It’s not good,” Magnus replied, pulling off his wet jacket. “It’s the drugs. They’re feeding on the blood of people who are taking drugs. It must be escalating their need and lowering their impulse control.”