It was pretty dark in the hallway because the sun had set entirely. Rissa turned on the light switch and went up the stairs casually. Then, she unlocked the glass office door and went inside.
Inside the office, it was even darker. The distance from the office door to Rissa's desk is quite far. Luckily, she immediately found her cell phone on her desk.
Then Rissa turned on her cell phone; the battery was weak. When she turned on her cell phone screen, there were ten missed calls from unknown numbers.
Suddenly, Rissa heard someone lock the office door from outside. Then the man turned off the light on the stairs. Rissa's heart was beating so fast that she could feel it up to her neck. Rissa walked towards the exit quickly, and someone completely locked the door.
