Iris stood frozen at the doorway.
The hallway outside was empty.
No footsteps.
No elevator sound.
No sign that anyone had been there.
Only the black envelope rested quietly on the floor.
Her heart pounded as she bent down and picked it up.
The paper felt unusually cold in her hands.
There was no stamp.
No sender's name.
Nothing except the silver words written across the front.
"Stop searching for the truth... or you'll disappear next."
A chill ran through her body.
She slowly opened the envelope.
Inside was a single photograph.
It showed the university's old library.
On the back, someone had written another message.
**"Tomorrow. 7:00 PM."**
Nothing else.
No explanation.
No signature.
Iris stared at the photograph for several minutes.
Who was sending these messages?
And how did they know everything that was happening?
The next morning, she couldn't focus during class.
Every time she looked at Ethan, she remembered the promise they had made as children.
Yet he never once looked back at her.
To him...
She was still a stranger.
When the final class ended, Iris walked toward the library.
She stopped in front of the old building.
The photograph was real.
Every detail matched.
She checked the time.
6:58 PM.
The campus had become unusually quiet.
A cold wind swept through the empty courtyard.
6:59 PM.
Her phone suddenly vibrated.
Another message from the unknown number appeared.
**"Go inside alone."**
Before Iris could react, the lights inside the library flickered.
Then...
They went out.
The entire building fell into darkness.
Her breathing became uneven.
She knew she should leave.
She knew this could be a trap.
But if she walked away now...
She might never learn why everyone was forgetting her.
Taking a deep breath, Iris pushed the old wooden door open.
It creaked loudly.
The darkness swallowed her whole.
Then, from somewhere deep inside the library...
A familiar voice whispered her name.
"Iris..."
She froze.
That voice...
It sounded exactly like Ethan's.