This quest is gained by talking to Aldeth Sashenstar in front of the Merchants' League Estate. In order for him to be there, Gorion's Ward and their party must have sided with him at his hut in the first area of the Cloakwood; otherwise, his brother, Dabron Sashenstar, will be there and will attack you. When you talk to him, he'll say that something is off at the Merchants' League and that his two partners, Irlentree and Zorl, have been acting weird and making bad buisness decisions. You'll be asked to investigate this and invited inside the building. Once inside, go to the second floor; in a locked desk in the southern room, there are documents from which you will learn the truth: Irlentree and Zorl are actually doppelgangers. From here you can choose one of two paths: