This is a secret story related and shouldn't be missed at all!
This is a very short prologue and should not pose any greater challenge.
There are also no collectibles in this mission either.
The run-down of the game can be found below in case you do like to know what lies ahead.
*** Spoiler - click to reveal ***At the start of this mission you see your character in the progress of having her memories removed, a scientist will ask some questions and then you will be told to follow the floating robot.
Follow the orange line and stand in the queue behind the other 3/4 guys, move up to the next standing point when told to do so.
All while this happens some 1 will be trying to talk to you, once your in the queue he will tell you to look left and the shuttered door, he will create a diversion and the door will open a little, walk over to it and you will automatically get under it.
Once on the other side move on down the corridor and you will be chased by a robot enemy, simply run down the corridor dodging around the debris.
At the end there will be a grate on the right, run over to it and you will jump in and slide down to the next section.
Walk over the big round platform and you will be told to get into one of the coffins/caskets.
Once you walk over to them the FMV will take over and the mission ends and the trophy will pop soon after.