After you tell Estinien of your Echo vision, he wishes to ask Hraesvelgr for the truth of the past.

Requirements

This quest is available if you have completed the quest Into the Aery.

Starting the Quest

Talk to Estinien in the Churning Mists to begin the quest.

Speak with Ysayle

Go southwest to where the orange arrow is pointing in the minimap. Talk to Ysayle to complete the quest. There will be a cutscene. This one is important, so it is recommended to watch it either now or via the Unending Journey in an inn room.

Next Main Scenario Quest

After you complete the quest, you will need to be at least level 56 to proceed to the next quest. After you reach level 56, talk to Estinien to accept the next quest: Unrest in Ishgard. There will be a cutscene. This one is important, so it is recommended to watch it either now or via the Unending Journey in an inn room.