Got Dropped into a Ghost Story, Still Gotta Work

I stood frozen, staring at Isolation Room B14.

Creak, creeeak.

The rusty hinges groaned like a scream as the door to the isolation room began to open.

It was a door that should never have opened. And from within, a dark figure...

"Run."

I immediately turned and sprinted toward the exit of the isolation corridor. Beside me, I could hear Supervisor Park Minseong running just as frantically. Survival instincts pushed my legs forward while my mind raced in confusion.

'What the hell is this?'

What's going on?

'In the work tips...'

Tip 4 said to ignore the sounds coming from the isolation rooms. Tip 11 said to yell and tell it to shut up to quiet it down.

But before I could decide which rule to follow, the door opened?

What on earth is in there...?