Théodred wants you to speak to some of the survivors of the Falcon-clan's betrayal of the Grey Company.
'Not every member of the Falcon-clan agreed with Lheu Brenin's decision; those that did not were slain or forced to flee. One of those who escaped is the woman Seren, and it is from her that I have learned much of what befell within Tâl Methedras.
'I had been working closely with your friend Saeradan before you were captured, and he now burns with the desire to free what Rangers still live, if any do. He is very wise, and it seems if there is any hope of rescue he may be able to devise it. Speak with him on this account.
'You might also seek the advice of my trusted friend Hogawise. He excels in battle and has been a boon companion on this excursion into Gravenwood.'
Saeradan, Seren, and Hogawise are at Théodred's camp in the Gravenwood.
Théodred wants you to speak to survivors of the Falcon-clan's betrayal in order to learn what happened while you were imprisoned in Isengard.