You are one of The Followers of Set, who has spent years infiltrating the evil People in Black.  You have spent years pretended to be part of the Black lineage (and learning their lies about mighty Set), but it's all a sham -- in fact, you are learning everything you can about them, to pass word back to your true people.  But you must be careful and discreet -- who knows what they would do to you if they knew you were a spy...