Inside Where? - Heist

It was an inside job. They knew it was an inside job. But they refused to even tell him what the "inside" was. And they *still* expected his to solve the damned thing! He stared at the pair sitting across the desk from him. They smiled blandly back at him, though their eyes were worried. "The pay will be very generous--" the tall one ventured. "I'm sure it will be. What I'm not sure of is how the hell you expect me to investigate anything when you won't even tell me what, who, or how I'm investigating anything!" They exchanged glances, and then the short one said tentatively, "We understand that you're very good." "Good, I am. A miracle-worker, not so much." Except for--

Inspiration: @cvalenti talking about secret societies and @wishiwasyou saying it was an inside job on Twitter.
Story Potential: High.
Notes: Of course, as an initiate he'd only have access to the lower-level secrets. Hrm. This would require some noodling to work out.