Celia, a tired-looking woman in her thirties, approached Mara. “I never meant your home to be used,” she said. “Simon said you had agreed to the outside photographs.”

“You brought a child into my yard.”

“I know. I accepted his explanation when I shouldn’t have.”

“Did you touch my service door?”

“No. I didn’t even know there was a service door.”

Mara studied her. Celia did not seem to be rehearsing lines. Her worry showed in the way she kept twisting the seam of her jacket between her fingers.

“Why are you still here?” Mara asked.

“Because these sets belong to a team of people. I want to stop him without punishing everyone who built them.”

They walked past a fake laundromat and entered the room displayed in the advertisements. The orange armchair stood beneath a slanted painting. The red wagon was beside the window, and the green raincoat hung from the back of a chair. Up close, the wagon’s paint was chipped. Its wheels were dusty from real pavement.

Mara picked up a card from the table. It held a photograph of a house identical to hers, followed by a question: WHOSE DOOR IS NOT LOCKED?

Celia went pale. “That wasn’t in the version we approved.”

A voice came from the room’s hidden speakers. “Celia, put down the cards.”

Everyone froze.

Simon Rusk stepped into the doorway. He was tall and neatly dressed, with a pleasant expression that had become inappropriate the instant he chose to keep wearing it. In one hand he held a small remote.

“This is an unfortunate misunderstanding,” he told Holt. “The show deals with boundaries. Some audiences find that uncomfortable.”

“It’s not a show tonight,” Holt said. “We need you to come with us and answer questions.”

Simon smiled. “Of course. But first, I’d appreciate it if nobody damaged the exhibit.”

He pressed the remote. The lights went out. A woman screamed. The sound of a door closing echoed through the warehouse, followed by a recorded child’s voice asking, “Where am I?”

Holt raised her flashlight and called for everyone to remain where they were. Mara stood still, counting the seconds. She understood then why Simon had insisted on the theatre of uncertainty. In darkness, with sound echoing from different corners, adults became susceptible to any voice that sounded authoritative.

A white line of light appeared beneath the far door. Simon had gone through it while people turned toward the speakers. Holt followed with another officer. Mara and Priya stayed beside Celia.

“The exit is this way,” Celia said, pointing toward the left corridor.

Priya shook her head. “That corridor wasn’t there when we entered.”

Celia looked again and swore softly. A movable wall had rolled into place, blocking the usual path. It was part of the show’s changing layout.

“Can you move it?” Mara asked.

“From the booth. But the booth is past the wall.”

The audience members began to argue. Someone said the whole thing was an elaborate performance. Someone else wanted their money back. Mara stepped onto the small stage beside the orange chair.

“This isn’t part of a game,” she said. “Please stop trying the doors at random. The building staff know which exits are real. We need to stay together.”

The authority in her voice surprised her. Years of managing restless classrooms had taught her how to speak when nobody else was ready.

Celia led them to a marked emergency exit behind a painted grocery counter. Its handle worked, though the alarm gave an ugly shriek when she pushed it. Fresh night air entered. The visitors hurried out. Mara waited until the last one had cleared the threshold, then followed Priya into the parking lot.

Holt was already there beside a patrol car. Simon had disappeared from the rear loading bay. The white van was missing.

Celia pressed both hands to her face. “He’s going to the house.”

Chapter Nine: A House Is Not a Stage

Holt ordered Mara not to return home. It was a reasonable command and, for several seconds, Mara obeyed it without argument. Then Celia said something that transformed her fear into a precise question.

“The finale uses a live feed,” Celia explained. “Simon installed a projector at the last location. It makes a person’s own house look occupied by a character from the story. The audience sees the picture and thinks they’re watching reality change.”

“Where is the projector?” Mara asked.

“I don’t know. He never showed me the final setup.”

“The black case,” Mara said. “He brought it to my yard.”

Holt called for officers to secure the house. Mara was instructed to remain with Priya. She did. But she opened her camera app, the same one that had alerted her to the brick, and watched the empty patio. The board was still over the window. The garden bench stood beneath the service door. The back gate was shut.

Then the live image brightened. A pale figure appeared in the doorway of the garden shed, a boy in a green raincoat. The figure turned its head toward the camera.

Priya gasped. “That’s Owen.”

“No,” Mara said. “That’s light.”

The figure lacked a shadow on the ground. It moved with the smoothness of a prerecorded sequence, and its bright green coat didn’t change color beneath the yard lamp. A projector somewhere was casting the image onto a thin screen or mist. Mara had seen something similar in the Arcadia advertisement.

A caption appeared in the camera feed, not as part of the app but on a card placed within view: OPEN THE WRONG DOOR.

Holt, still on the call, asked Mara to describe exactly what she saw. As Mara spoke, a real person entered from the left edge of the picture: Willa Fenwick, carrying a flashlight. She stopped, stared at the green figure, and held her flashlight up to the projector beam.

The apparition vanished. Willa followed the light to its source, moving toward the garden bench.

“Willa, get away!” Mara shouted at the phone, although Willa could not hear her.

A man stepped out from behind the shed. Simon Rusk reached for Willa’s arm. She twisted away and the flashlight fell into the grass. The camera jerked as something struck its mount.

Holt was already relaying the location to the officers. Mara watched as Simon pulled a small folding screen from behind the bench and tried to carry it toward the van. Willa stood in his way. She was much smaller than he was. She did not attempt to strike him. Instead she pointed at the house and shouted something the camera microphone could not catch.

The first patrol car turned into the street. Simon dropped the screen and ran for the side gate, where another officer intercepted him. His attempt to slip past ended with both men stumbling against the fence. A second officer approached from the yard. Within moments Simon was on the ground, his hands restrained behind him.

Mara exhaled slowly. She had been holding her breath long enough to feel dizzy.

Willa stood beside the fallen projector screen, staring at the destroyed patio. In the bluish light of the security camera she looked suddenly old, not because of her wrinkles but because her anger had gone and left her uncertain what to do with her hands.

“She’s still there,” Mara said.

Holt answered, “Yes. We’re speaking to her now.”

The camera had captured the incident. But it was not the recording alone that brought Simon to a stop. It was a boy speaking truthfully about the photographs he’d taken, a mother refusing to let fear silence her, a business partner abandoning a false story, and a frightened elderly woman choosing to stand her ground after making a terrible mistake.

Mara wanted to go home. Holt told her the property was secure but asked her to wait until the next morning because technicians still needed to examine the devices. Mara agreed. For the first time since the brick, waiting seemed like a decision rather than a punishment.

The officers collected the projector early the following morning. A technician asked Mara to identify the garden bench in a photograph so he could confirm where the equipment had been concealed. She answered, then watched him measure the distance between the bench and the damaged service door. She had never expected the dimensions of her garden to become part of a police report.

Nathan Fenwick arrived while the officers were finishing. He stayed on the public sidewalk, a young man with dark circles. “My grandmother asked me to tell you she’s going to pay for the window,” he said. “I know she scared you. She scared me too.”

Mara looked at him. “Did she really think somebody was following you?”

“She did. I showed her my delivery schedule and the picture Simon sent her. He took it from the hardware store’s public social page. It wasn’t proof of anything. But he knew exactly which fear would make her listen.”

Nathan glanced toward the house. “I was angry enough to shout at her last night. She didn’t argue. She said I had every right.”