Behind The Cupboard

I haven't thought I could find such an impressive gateway in my entire life until my mother had to die. On the day of her funeral, I saw a paper beside her gravestone. It was written "Basement, behind the cupboard." Then on the left end of the paper, it says T01F. I frowned. What is this mean?

"Jeongin!" call my dad. I turn to see him and he's already standing beside our car. He asked me to get inside the car with shaking his head once.

I fold the paper and put it on my pocket. I'm still confused about that mysterious paper. I decide to check where it leads me when I'm home.

My black outfit still attached perfectly to my body when I go to the basement when I'm arrived. I looked around and found the cupboard. It is so dusty and old. I remembered that this cupboard was used to saving to hold CDs. But since we have Spotify and Youtube, who needs CDs then?

I shifted the cupboard. I thought it would be heavy but in fact it's very light. And what I saw is unbelievable.

There's a door here. I try to open it but then a hologram appears and asked me to enter the password. I reached the paper on my pocket and saw some random words and numbers on the end of the paper. I decide to enter it and it is successful. The door started to opening and I saw a futuristic city. I entered the door and there was an old man who greeted me.

"Finally! Our savior has come!" he cried.

"Savior?" I repeated.

"We've been waiting for someone for years to release us. It is said he will come through this door. And finally you came!" he explained.