Instead of resting at night, Yoon Seol-ah had to inspect Seoryeon Heights—a luxury apartment complex in central Seoul.
Seoryeon Heights would be officially opened soon, and Seol-ah was the architect who had designed the luxury building.
The building had thirty floors. Seol-ah reached the seventeenth floor and stood in front of a door that should never have existed.
“Why?” she murmured curiously. “I’ve checked every little detail. So why is there still a mistake?”
Unit 1708 should never have been built. The seventeenth floor only went up to Unit 1707. So how could Unit 1708 exist? Where was the mistake?
Seol-ah quickly pulled her phone from her black designer shoulder bag. She called the director she worked for.
“What is it, Seol-ah?” asked the man on the other end.
“Director Han, there’s a mistake in this building. Unit 1708 isn’t printed on the blueprint, so why does this unit exist now?”
“How could there be a mistake? Don’t you always monitor the construction?”
“Yes. You know I always monitor every small detail and every corner of the construction, so how could Unit 1708 exist?”
“Calm down, Seol-ah. I’ll ask the head of construction tomorrow. Go home once you’re finished.”
Director Han ended the call. Seol-ah continued gripping her phone, still puzzled. Every unit was locked, so she had no reason to try pushing the door open.
Fortunately, staff were already working at the apartment complex. Seol-ah decided to ask the security team.
However, as she stepped away with her back to Unit 1708, the unit’s door opened a few centimeters, spilling light from inside.
Seol-ah stopped in her tracks. She stood frozen for a moment, then turned around. Her eyes clearly saw that the unit door was open. But a chain latch kept it from opening any wider.
Seol-ah furrowed her brow and walked toward the unit door.
“Who’s in there?”
Seoryeon Heights had not yet been officially opened, so no one should have been living in any of the units. Then how could the door be open and the lights be on?
“Answer me. Who’s in there?” she asked impatiently. But there was no answer from inside.
Since Seol-ah couldn’t open the door any wider, she grew frustrated and decided to go to the security control room.
When she arrived at the security control room, she asked the staff there,
“Who’s living in Unit 1708? And how does that unit even exist?” Seol-ah asked impatiently.
One of the security control room staff answered, “No one is living in the unit. And wasn’t it built according to the blueprint your team created?”
The man was asking her a question in return. Was the mistake in the blueprint designed by Seol-ah’s team?
Impossible. That unit clearly hadn’t existed in the blueprint.
“No. That unit was never in the blueprint. I personally handed the blueprint to the head of construction,” Seol-ah replied.
“I don’t know anything about that, Miss Yoon. I’m staff here, not a construction worker.”
Seol-ah sighed. The man had a point. “Show me all the footage from the hallway outside Unit 1708. I want to know who’s living there.”
“All right.”
Seol-ah’s eyes remained fixed on the computer screen. The footage was sped up, but there was truly no one entering the unit.
“No one went in there, Miss Yoon,” the man said.
Yoon Seol-ah sighed. There was clearly someone inside, but the security footage showed no sign of anyone entering.
“Fine. Thank you. I won’t bother you anymore.”
At exactly ten o’clock, Seol-ah entered the elevator. She was slightly startled to see a man inside. Was he also a staff member at the apartment complex?
The sound of an incoming message came from Seol-ah’s phone. She took it out again and saw a message from an unknown number: “You shouldn’t have looked toward that door.”
Seol-ah furrowed her brow but didn’t reply. She suspected it was just some prankster messing with her.
“I saw you on the seventeenth floor. Did something happen?”
The question came from the man leaning against the elevator wall. Seol-ah immediately turned and studied him.
“Yes, there was a small problem. Do you work here?”
The man shook his head. “No. But I’m going to buy one of the units in this apartment complex.” He straightened up. He was about 185 centimeters tall. Seol-ah had to tilt her head back to look at his face.
“I’m here for work,” Seol-ah replied. Wait—why did she have to explain herself?
When the elevator doors opened, the man said something that left Seol-ah confused. “Don’t look into the unit that shouldn’t exist if you want to live in peace.”
The man stepped out before Seol-ah could process his words. The stranger had already disappeared from her sight.
Then another text message came in.
“Don’t trust the man you just met.”
Seol-ah gripped her phone tightly. “Who’s messing with me?”