A Small Problem

Aquisition
you will recieve this quest upon completion of the "On The Loose" quest (that is, if you completed the quest family matters in act 2). The quest will direct you to Varric at the Hanged Man. Speak with him to start the quest

Brief summary of the quest
Varric will tell you that he has been trying to sell his Bartrand's mansion in Hightown, but that he failed, since people believes that it's haunted. Varric suspects that the lyrium idol is still there, so he asks Hawke to company him and destroy it.