You are a quiet college student, you live alone in a quiet apartment, you chose that apartment because the rent was cheap enough for you. you live on the 11th floor, You feel quite strange with the room above you, every night you can feel the person who lives above your room dragging loads like a human, but you ignored it because you thought it was just a sack of rice.

One day you are working tidying up at a hotel, but tonight you are a little sick. Your boss gives you pain medication without a label, but you keep taking it because your pain is increasing.

after you took the medicine, your head was dizzy, you staggered home and accidentally pressed elevator number 12, after the elevator door opened you went to your room, You wanted to go straight to sleep but after you opened the room it turned out you were in the wrong room, suddenly you heard the footsteps of the owner of the room coming in, you hide in one of the rooms, and the owner of that room comes in with a woman with long hair, they chat and you wait for the right moment to come out. the woman said that she was pregnant and her boyfriend broke up with her.

after a while, you hear the sound of a knife being swung, you peek and see that the owner of this room killed the woman by slitting her neck. you were shocked and wanted to get out of here immediately, you saw the window and jumped from the 12th floor, luckily there was a balcony in your room so you didn't fall down, you fainted

you wake up and realize that you are in the hospital, it turns out the owner of the room was the one who took you to the hospital, he pretended to be stupid when asked by the police and now he is targeting you

your job is to uncover Xavier's secret job!