After recruiting all of your allies, return to the Arl of Recliffe and speak to him about traveling to Denerim. This quest will begin in Denerim with you finding out that the queen has been kidnapped by Arl Howe. Break into his castle and rescue the queen. Then you'll investigate the rioting that has gone on in the elven part of town. Investigate the plague and suspicious activities in the Elven Alienage, and then head back to Arl Eamon to begin the Landsmeet. In the end, you will choose who will be the leader of Ferelden.