I got nervous for a minute. The van headed west—in exactly the opposite direction from the lake. Then the driver turned north, and after a few minutes I realized that we were headed for one of the marinas at the north end of Lake Shore Drive. I forced myself to keep my breathing smooth and even. If the bad guys tumbled to the fact that we’d already guessed their location, the situation could devolve pretty quickly.

Michael sat calmly, his face imperturbable, his hands resting on the sheathed form of Amoracchius, the picture of saintly serenity. Sanya, behind us, let out a low, buzzing snore. It wasn’t as saintly as Michael, but it conveyed just as much blithe confidence. I tried to match their calm, with mixed results. Don’t get jittery, Harry. Play it cool. Ice water in your veins.

The van stopped at one of the marinas off Northerly Island. Rosanna got out without a word and we followed her. She stalked down to the shore, out onto the docks, and out to a modestly sized ski boat moored at the dock’s end. Michael and I went aboard after her. Sanya untied the lines holding the boat to the dock, pushed it away from the pier, and casually hopped across the widening distance and into the vessel.

It took her a couple of minutes, but Rosanna coaxed the old boat’s engines to life and turned us away from the lights of the city and out into the darkness of the great lake.

It was eerie how swiftly the world became pitch-black. That strange faerie-light of the night under a heavy snow vanished out on the waters of the lake, where the snow simply sank into the depths. The low overcast gave us a little light, for a time, reflecting the glow of the city, but as the boat continued skimming out into the center of the lake, even that faded away until I could barely distinguish the outline of the boat and its occupants against the water all around.

I wasn’t sure how long we went on like that in the dark. It seemed like an hour, but it couldn’t have been more than half that. The boat bounced across waves, whump, whump, whump, throwing up splashes of spray that coated the bow in a shining crust of ice. My stomach got a little queasy as I tried to anticipate the motion in the darkness and failed.

At length, the rumble of the boat’s engine died away, and then stopped altogether. The silence was disorienting. I’ve lived my entire adult life in Chicago. I’m used to the city, to its rhythms, its music. The hum and hiss of traffic, the clatter of elevated trains, the blaring radios, the beeping horns, cell phones, sirens, music, animals, and people, people, people.

But out here, in the center of the vast, empty cold of the lake, there was nothing. No heartbeat of the city, no voices, no nothing, except the glug and slap of water hitting the hull of the boat.