After you introduce yourself to Dadanen in Horizon, he has a message for you to deliver.

Requirements

This quest is only available if you started the game in Ul'dah, and you have completed the quest Takin' What They're Givin'.

Starting the Quest

Talk to Dadanen in Horizon in Western Thanalan to begin the quest.

Deliver Dadanen's Final Notice

Go east from Horizon to find Drunken Stag and give him Dadanen's Final Notice.

Next Main Scenario Quest

After completing the quest, talk to Drunken Stag to accept the next quest: Give It to Me Raw.