Big brother Mycroft sends you a series of cases linked to homeland security. Make the Empire proud!

This DLC includes the following items:

A Rat on a Boat
The Rugged Informant
Gone Girl
In For A Penny...
Mycroft's Official Attire
Black Deluxe Suit
Official Jon Outfit

The quest line becomes available after the player receives a letter from Mycroft at Sherlock's Manor. The second main quest (A Gilded Cage), and a side quest (Love, Death, and Cordona) must have been completed.