Dishonored: The Brigmore Witches, the third add-on for Arkane Studios' 2012 stealth action title, will be released Aug. 13 on PlayStation Network and Windows PC for $9.99, and on Xbox Live for 800 Microsoft Points ($10), publisher Bethesda Softworks announced today.

The Brigmore Witches is Dishonored's second story-based expansion. It will conclude the story of the assassin Daud, who was a non-playable character in the original game and was the focus of the previous add-on, The Knife of Dunwall. Bethesda teased the upcoming DLC yesterday with two pieces of concept art.

(Note: Some spoilers for Dishonored and The Knife of Dunwall follow.)

Daud tracked down Delilah, the head of the Brigmore Witch coven, in The Knife of Dunwall. Now it's up to him to stop her from carrying out an arcane ritual that will end his existence. Since Daud can't rely on his lieutenant, Billie Lurk, anymore, he must work with other gangs, the Dead Eels and the Hatters, as he travels through new districts of the city of Dunwall. In the end, he'll have to answer for his crimes — which include the murder of Empress Jessamine Kaldwin.

If players have a save file from The Knife of Dunwall, their progress — power, weapon and item upgrades; Chaos level; and actions — will carry over to The Brigmore Witches. The upcoming DLC will be playable at QuakeCon in early August.

You can check out two Brigmore Witches screenshots above.