You have been summoned to an audience with the Sultana in Ul'dah.
Requirements
This quest is available if you have completed the quest Echoes of an Echo.
Starting the Quest
Talk to Alphinaud in The Lochs to begin the quest.
Speak with Bartholomew in Ul'dah
Teleport to Ul'dah and use the Aetheryte to go to The Chamber of Rule. Then go south to where the orange arrow is pointing in the minimap and talk to Bartholomew. There will be a cutscene.
Speak with Nanamo
Go to an Aethernet Shard and use it to go to the Adventurers' Guild. Then go to the quest icon on the map and talk to Nanamo.
Speak with Nanamo near Stonesthrow
Go northwest and through the Gate of Nald to reach Central Thanalan. Go to the quest icon on the map and talk to Nanamo.
Speak with Nanamo at the Unholy Heir
Go northeast to where the orange arrow is pointing in the minimap and talk to Nanamo.
Speak with Nanamo in the Coliseum
You can either fly southwest to go through the gate into Ul'dah, or you can teleport there. Use the Aetheryte or an Aethernet Shard to go to the Gladiators' Guild. Go to the quest icon on the map and talk to Nanamo. There will be a cutscene.
Speak with Nanamo Again
Talk to Nanamo to complete the quest.
Next Main Scenario Quest
After you complete the quest, talk to Nanamo to accept the next quest: A Sultana's Duty.