Lacey cut her eyes at Ben and said, “Not. Appropriate.”

“Sorry,” Ben mumbled. “I think she’s in Orlando,” he said. “Watching us look. And watching her parents not look.”

“I’m still for New York,” Lacey said.

“All still possible,” I said. A Margo for each of us — and each more mirror than window.

The minimall looked as it had a couple days before. Ben parked, and I took them through the push-open door to the office. Once everyone was inside, I said softly, “Don’t turn on the flashlight yet. Give your eyes a chance to adjust.” I felt fingernails dig at my forearm. I whispered, “It’s okay, Lace.”

“Whoops,” she said. “Wrong arm.” She’d been searching, I realized, for Ben.

Slowly, the room came into a hazy gray focus. I could see the desks lined up, still waiting for workers. I turned on my flashlight, and then everyone else turned theirs on as well. Ben and Lacey stayed together, walking toward the Troll Hole to explore the other rooms. Radar walked with me to Margo’s desk. He knelt down to look closely at the paper calendar frozen on June.

I was leaning in next to him when I heard fast footsteps coming toward us.

“ People,” Ben whispered urgently. He ducked down behind Margo’s desk, pulling Lacey with him.

“What? Where?”

“Next room!” he said. “Wearing masks. Official-looking. Gotta go.”

Radar shone his flashlight in the direction of the Troll Hole but Ben knocked it down forcefully. “We. Have. To. Get. Out. Of. Here.” Lacey was looking up at me, big-eyed and probably a little bit pissed off that I’d falsely promised her safety.

“Okay,” I whispered. “Okay, everybody out, through the door. Very cool, very quick.” I had just started to walk when I heard a booming voice shout, “WHO GOES THERE!”

Shit. “Um,” I said, “we’re just visiting.” What an outlandishly lame thing to say. Through the Troll Hole, a white light blinded me. It might have been God Himself.

“What are your intentions?” The voice had a slight faked Britishness to it.

I watched Ben stand up next to me. It felt good not to be alone. “We’re here investigating a disappearance,” he said with great confidence. “We weren’t going to break anything.” The light snapped off, and I blinked away the blindness until I saw three figures, each wearing jeans, a T-shirt, and a mask with two circular filters. One of them pulled the mask up to his forehead and looked at us. I recognized the goatee and flat, wide mouth.

“Gus?” asked Lacey. She stood up. The SunTrust security guard.

“Lacey Pemberton. Jesus. What are you doing here? With no mask? This place has a ton of asbestos.”

“What are youdoing here?”

“Exploring,” he said. Somehow Ben was emboldened with enough confidence to walk up to the other guys and offer handshakes. They introduced themselves as Ace and the Carpenter. I would venture to guess that these were pseudonyms.

We pulled around some rolling desk chairs and sat in an approximate circle. “Did you guys break the particleboard?” Gus asked.

“Well, I did,” Ben explained.

“We taped that up because we didn’t want anyone else in. If people can see a way in from the road, you get a lot of people coming in who don’t know shit about exploring. Bums and crack addicts and everything.”

I stepped forward toward them and said, “So, you, uh, knew that Margo came here?”

Before Gus answered, Ace spoke through the mask. His voice was slightly modulated but easy to understand. “Man, Margo was here all the damned time. We only come here a few times a year; it’s got asbestos, and anyway, it’s not even that good. But we probably saw her, like, what, like more than half the time we came here in the last couple years. She was hot, huh?”

“Was?” asked Lacey pointedly.

“She ran away, right?”

“What do you know about that?” Lacey asked.

“Nothing, Jesus. I saw Margo with him,” Gus said, nodding toward me, “a couple weeks ago. And then I heard that she ran away. It occurred to me a few days later she might be here, so we visited.”

“I never got why she liked this place so much. There’s not much here,” said the Carpenter. “It’s not great exploring.”

“What do you mean exploring?” Lacey asked Gus.

“Urban exploring. We enter abandoned buildings, explore them, photograph them. We take nothing; we leave nothing. We’re just observers.”

“It’s a hobby,” said Ace. “Gus used to let Margo tag along on exploring trips when we were still in school.”

“She had a great eye, even though she was only, like, thirteen,” Gus said. “She could figure a way into anywhere. It was just occasional back then, but now we go out like three times a week. There’s places all over. There’s an abandoned mental hospital over in Clearwater. It’s amazing. You can see where they strapped down the crazies and gave them electroshock. And there’s an old jail out west of here. But she wasn’t really into it. She liked to break into the places, but then she just wanted to stay.”