You are standing on some stairs.  You are going to continue moving forward up these stairs.  Once at the top you are going to turn to your left.  And you are going to see directly in front of you some double doors that are wide open.  You are going to go thru those doors.  And you will see there is a desk area in this room.  You are going to hop over the desk so you are landing right in front the closed black doors.  Once you are in front of those closed black doors with the head of the desk behind you you are done.