I shrugged. "None," I said, and officially, it was true. The White Council of wizards did not allow the discussion of demons that could be called to earth, beings of spirit that could gather flesh to themselves. Usually, a spirit-circle was enough to stop all but the most powerful demons or Elder Things of the outer reaches of the Nevernever. But this third circle was built to stop things that could transcend those kinds of boundaries. It was a cage for demonic demigods and archangels.

Kim wasn't buying my answer. "I don't see why anyone would make a circle like this to contain nothing, Harry."

I shrugged. "People don't always do reasonable, sensible things. They're like that."

She rolled her eyes at me. "Come on, Harry. I'm not a baby. You don't have to shelter me."

"And you," I told her, "don't need to know what kind of thing that third circle was built to contain. You don't want to know. Trust me."

She glowered at me for a long moment, then sipped at her ale and shrugged. "All right. Circles have to be empowered, right? You have to know how to switch them on, like lights?"

"Something like that. Sure."

"How would a person turn this one on?"

I stared at her for a long time.

"Harry?" she asked.

"You don't need to know that, either. Not for an academic interest. I don't know what you've got in mind, Kim, but leave it alone. Forget it. Walk away, before you get hurt."

"Harry, I am not—"

"Save it," I told her. "You're sitting on a tiger cage, Kim." I thumped a finger on the paper for emphasis. "And you wouldn't need it if you weren't planning on trying to stick a tiger in there."

Her eyes glittered, and she lifted her chin. "You don't think I'm strong enough."

"Your strength's got nothing to do with it," I said. "You don't have the training. You don't have the knowledge. I wouldn't expect a kid in grade school to be able to sit down and figure out college calculus. And I don't expect it of you, either." I leaned forward. "You don't know enough yet to be toying with this sort of thing, Kim. And even if you did, even if you did manage to become a full-fledged wizard, I'd still tell you not to do it. You mess this up and you could get a lot of people hurt."

"If I was planning to do that, it's my business, Harry." Her eyes were bright with anger. "You don't have the right to choose for me."

"No," I told her. "I've got the responsibility to help you make the right choice." I curled the paper in my fingers and crushed it, then tossed it aside, to the floor. She stabbed her fork into a cut of steak, a sharp, vicious gesture. "Look, Kim," I said. "Give it some time. When you're older, when you've had more experience …"

"You aren't so much older than me," Kim said.

I shifted uncomfortably in my seat. "I've had a lot of training. And I started young." My own ability with magic, far in excess of my years and education, wasn't a subject I wanted to explore. So I tried to shift the direction of the conversation. "How is this fall's fundraiser going?"

"It's not," she said. She leaned back wearily in her seat. "I'm tired of trying to pry money out of people to save the planet they're poisoning or the animals they're killing. I'm tired of writing letters and doing marches for causes no one believes in anymore." She rubbed at her eyes. "I'm just tired."

"Look, Kim. Try to get some rest. And please, please don't play with that circle. Promise me."

She tossed her napkin down, left a few bills on the table, and stood up. "Enjoy your meal, Harry," she said. "And thanks for nothing."

I stood up as well. "Kim," I said. "Wait a minute."

But she ignored me. She stalked off toward the door, her skirt swaying along with her long hair. She cut an impressive, statuesque figure. I could feel the anger bubbling off her. One of the ceiling fans shuddered and let out a puff of smoke as she walked under it, then whirled down to a halt. She raced up the short flight of stairs and exited the bar, banging the door shut behind her. People watched her leave, then glanced back to me, speculation on their faces.

I sat back down, frustrated. Dammit. Kim was one of several people I had coached through the difficult period surrounding the discovery of their innate magical talents. It made me feel like crap to withhold information from her, but she had been playing with fire. I couldn't let her do that. It was my responsibility to help protect her from such things, until she knew enough to realize how dangerous they were.

To say nothing of what the White Council would think of a nonwizard toying with major summoning circles. The White Council didn't take chances with things like that. They just acted, decisively, and they weren't always particular about people's lives and safety when they did it.

I had done the right thing. Keeping that kind of information out of Kim's hands had been the right decision. I had been protecting her from danger she didn't, couldn't, fully appreciate.

I had done the right thing—even if she had trusted me to provide answers for her, as I had in the past, when teaching her to contain and control her modest magical talents. Even if she had trusted me to show her the answers she needed, to be her guide through the darkness.

I'd done the right thing.

Dammit.

My stomach was soured. I didn't want any more of Mac's delicious meal, steak or no steak. I didn't feel like I'd earned it.

I was sipping ale and thinking dark thoughts when the door opened again. I didn't look up, occupied as I was with brooding, a famous pastime of wizards everywhere. And then a shadow fell over me.

"Sitting here pouting," Murphy said. She bent over and absently picked up the wadded scrap of paper I had tossed aside earlier, tucking it tidily into her coat pocket rather than letting it lie about as clutter on the floor. "That's not much like you, Harry."

I glanced up at Murphy. I didn't have far to look. Karrin Murphy wasn't much more than five feet tall. She'd gotten her golden hair cut, from shoulder length to something far shorter, and a little longer in front than in back. It was a punky sort of look, and very appealing with her blue eyes and upturned nose. She was dressed for the weather in what must have been her at-home clothes: dark jeans, a flannel shirt, hiking boots, and a heavy woodsman's jacket. She was wearing her badge on her belt.

Murphy was extremely cute, for a grown adult who also held a black belt in aikido, and had several marksmanship awards from Chicago PD. She was a real professional, one who had fought and clawed her way up the ranks to become full lieutenant. She'd made enemies along the way, and one of them had seen to it that she was put in charge of Special Investigations soon after.

"Hello there, Murphy," I told her. I took a swig of ale and said, "Long time, no see." I tried to keep my voice even, but I'm pretty sure she heard the anger in it.

"Look Harry—"

"Did you read the editorial in the Tribune? The one criticizing you for wasting the city's money hiring a 'charlatan psychic named Harry Dresden'? I guess you must have, since I haven't heard from you since it came out."

She rubbed at the bridge of her nose. "I don't have time for this."

I ignored her. "Not that I blame you. I mean, not many of the good taxpayers of Chicago believe in magic, or wizards. Of course, not many of them have seen what you and I have. You know. When we worked together. Or when I was saving your life."

Her eyes tightened at the edges. "I need you. We've got a situation."

"You need me? We haven't talked for more than a month, and you need me all of a sudden? I've got an office and a telephone and everything, Lieutenant. You don't need to track me down here while I'm having dinner."

"I'll tell the killer to be sure to operate during business hours next time," Murphy said. "But I need you to help me find him."