Photography assignment is to create/portray a sense of mystery?

I'm in a University Photography class and our assignment this week is to create and portray a sense of mystery in the photos. I have absolutely no idea where to even start. The professor said not to show an actual mystery (?) but to portray a sense of mystery. This has left me utterly confused. Any suggestions or advice as to what he may be talking about?
Thanks
 
Back
Top