MAFIA BOSS HAD NEVER HEARD OF MEREDITH LAWSON, THE YOUNG ENGINEER WHO WORKED WHILE THE REST OF THE HOTEL SLEPT—BUT WHEN HIS SISTER BECAME TRAPPED OUTSIDE THE TOWER, THE WOMAN WHO KNEW EVERY BREAKER AND CABLE ROUTE SUDDENLY HELD THE KEY TO THE EMERGENCY.

I reached the sixteenth-floor service landing at 2:13 a.m., four minutes after Arturo's call, with my radio bouncing against my ribs and the kind of fear that makes every sound precise. The elevator doors opened on a corridor smelling of fresh paint and wet carpet. A maintenance sign had been left against the wall. Behind it, the door to the north-face equipment room stood open.

That was wrong. The equipment room required two keys. Mine lived on a chain beneath my shirt; the other belonged to Desmond Harris. On storm nights we kept that door locked because the cradle was supposed to be parked on the roof, secured and electrically isolated. Nobody should have been able to reach the controls. Nobody should have been outside.

Arturo stood by the glass, one hand pressed against his ear, trying to hear his radio. He was a small man who remembered every guest's preferred newspaper. Now his face looked gray.

"She's down there," he said. "About two floors. The left side keeps dropping."

I looked through the window. Fifty meters above the street, suspended against the hotel's black northern wall, hung a narrow maintenance platform. Lightning turned its steel rails silver. One end was tilted several feet below the other, and a woman in a pale dress clung to the higher railing. Her hair lashed around her face. Water poured off her shoulders. The wind was making the rig swing away from the glass and crash back against it.

I knew that machine. A two-motor suspended access platform, controlled from an onboard panel, with separate wire ropes and secondary brakes intended to prevent a free fall. I had filed seventeen work orders about the left-hand limit sensor and three about a brake that engaged late under uneven load. Harris had closed all of them as "monitor and review." Six weeks earlier, I'd attached photographs of the frayed sheathing on the pendant cable. Someone had deleted those photographs from the maintenance portal.

The woman looked toward us. For an instant her face appeared in the rectangle of a flash. She might have been twenty-five. She was screaming, but the glass and storm swallowed her voice.

"Call nine-one-one," I told Arturo. "Tell them suspended platform, north face, approximately fifty meters up, structural instability, one person, conscious. Ask for technical rescue. Then tell the desk to clear the street and lock down the north service entrance. Nobody stands below that rig."

"The manager said not to call the fire department until—"

"Call them now."

He heard something in my voice and obeyed.

I tried the equipment room panel. It was live. A red fault light blinked beside the left winch, while the right displayed a code that indicated unauthorized manual override. Someone had restored power to a system that had been prohibited from operating. Someone had also bypassed the storm lockout.

On my checklist, there was a photograph taken in July of that control cabinet. I pulled it out and compared the wiring. An orange jumper bridged two terminals that were supposed to remain separate. I did not touch it. If I disturbed that evidence, we might never learn who had put it there. More urgently, removing it while the platform hung crooked could release a brake.

My radio crackled. "Lawson, what the hell are you doing on sixteen?"

Harris. Of course.

"Emergency on the north face. Fire rescue has been called. I'm isolating the equipment room and checking the platform condition."

"Nobody authorized a fire response. Step away from the panel."

"A woman is fifty meters above pavement in forty-mile-an-hour wind. Authorization is not our most important problem."

He swore. I let him swear into the open channel while I checked the mechanical status display. I needed to know whether the platform could hold its position until rescue arrived. The left winch registered an intermittent load value, rising and dropping too quickly to be real. Either its sensor was broken or somebody had corrupted the signal. Both answers were bad.

The platform bucked. The woman dropped to her knees.

I went to the window, pressed the radio button, and spoke to Arturo, who was now on the phone with dispatch. "Tell them to bring their high-angle team. Say the platform's motion is unstable. Nobody should attempt to raise or lower it from the normal controls."

Then I saw the woman look upward. She was speaking into a phone. The screen's tiny glow went dark. She pressed it again. Nothing. She was alone out there with an inoperative phone and two hundred feet of weather beneath her.

The stairwell door opened behind me. Harris came through wearing a raincoat over his golf shirt, breathless and furious. He wasn't alone. Evelyn Marsh, the general manager, followed him, holding a hotel-branded umbrella as if it could protect her indoors.

"The guest on that platform," Evelyn said, "is Sofia DeLuca."

I knew the name. Anyone who read the newspaper knew the DeLucas. Hotels called Matteo DeLuca an investor. Prosecutors called him a person of interest. Men who owed him money called him sir. His younger sister chaired a foundation that paid for emergency housing and scholarships, at least according to the glossy brochures displayed downstairs.

"How did she get out there?" I asked.

Evelyn stared through the window. "She was supposed to inspect a lighting feature for tomorrow's event. A contractor said it was safe."

"In a storm?"

"The contractor said the weather had cleared."

The wind rattled the glass hard enough to make her step back.

"Who signed her onto a suspended rig?" I asked.

Harris looked at his shoes.

"Desmond?" Evelyn said.

"I didn't personally authorize the platform."

I turned toward him. "That's not the same as saying you didn't know."

"Watch your tone, Lawson."

At the window, Sofia began pounding the railing with one hand. The rig's lower corner had descended another foot.

I understood then that we were running out of time. The fire department would have to establish rooftop anchors and lower a rescuer, and the storm could make the operation dangerously slow. I could help them by doing what I knew: locating certified anchor points, obtaining the rig's service manuals, getting the correct keys, identifying the electrical feeds and keeping uninformed people away from a damaged machine.

I could not safely swing a stranger into the window with a makeshift rope, and I would not pretend that courage replaced training. But there was one thing I could do immediately.

The sixteenth-floor conference suite had a service hatch connecting to a maintenance balcony ten feet from the platform's upper end. A fixed, rated emergency walkway existed behind an architectural screen. The hotel had sealed its access door during renovations, but the door hadn't been welded. It had a keyed lock, and I carried the key.

"I'm checking the rescue access," I said.

"You are not going outside," Harris snapped.

"I'm going to the protected balcony door. The rescue team needs a route and a verified anchor."

I took Arturo with me. He carried a flashlight while I opened the service hatch. Wind shoved water beneath the threshold. The walkway was narrow but shielded on three sides, and a permanent anchor plate with an engraved rating had been bolted to the concrete long before Harris became director.

Its inspection tag was missing.

I photographed the plate and backed inside. No one would use it until qualified rescuers confirmed its condition. I radioed dispatch through Arturo's phone and gave them the access route. The dispatcher repeated it carefully.

From the balcony doorway we could see Sofia more clearly. Her lips moved. I couldn't hear her, but I could read one sentence because she'd repeated it so many times that the shape became unmistakable.

"I don't want to die."

I lifted both arms where she could see them and pointed first to myself, then toward the interior of the building. Help was inside. I showed her an open palm: stay low, hold position. She nodded once, shaking.

A deep metallic crack traveled through the rig. I felt it through the soles of my boots.

Harris appeared behind us, looking at his phone. "Matteo DeLuca is downstairs."

The words were barely out of his mouth when the radio burst alive with a new voice, low enough that I felt it in my chest.

"Who is responsible for my sister?"

Nobody answered.

"This is Matteo DeLuca. I want the name of the person running this rescue."

I pressed my transmitter before anyone could tell him something comforting and false.

"Meredith Lawson. Third-shift building engineer. Chicago Fire is responding. Your sister is conscious. The platform is unstable. We are preparing access for the rescue team, and nobody is touching the controls without their approval."

Silence, then, "Can you get her down?"

I looked at the swaying cage. At Sofia's white-knuckled hands. At the storm trying to peel the lake away from its shore.