Thie mission involves assassinating Lady Boyle at her costume party. Among other problems that arise like entry into the building is that there are 3 Lady Boyles' and you have to figure out which one is the target. Or you could just kill all three if you wanted to.

The thing that I really love about this game is that if you read the numerous articles on the web about this level, everyone of them is different on how they carry out the assassination.
October can’t get here fast enough!