Un voleur dans la nuit
It was, in her estimation, not exactly a difficult job, though the security system was more advanced than what she was usually used to.  But Adrienne had spent a considerable amount of time staking the place out and watching the comings and goings of the people who lived there.  More importantly, the plans provided by her employers, along with a few technological extras (she'd waived a portion of her fee in exchange for getting to keep them, in fact), should have made it easy enough.

More importantly, if she had done her work correctly, there was a slight gap in where the external security cameras covered.  But you would have to be able to fly, practically, to hit the spot correctly.

Fly... or leap.

She took a step backwards and then ran forward across the roof, leaping at the last second.  The strength in her legs was great and it carried her the distance, the suction cups she'd applied to her gloves letting her cling to the building's side.  Small tools made short work of the window latch and the security system, and she was able to slip inside.

She looked around and quickly nodded to herself, moving with all stealth.  The nice thing about most security systems was that when people were actually there, they tended to run at a much lower level.  Perfect.  And there was the lab.   And someone had even left the door slightly ajar. 

Almost too easy.  Carefully and quietly, she began to creep inside.