Hien has had a revelation of sorts, and has some improvements for the plan of attack.

Requirements

This quest is available if you have completed the quest The Doma Within.

Starting the Quest

Talk to Hien in Yanxia to begin the quest.

Speak with Alphinaud

You can teleport to the House of the Fierce or just go southeast to where the orange arrow is pointing in the minimap. Talk to Alphinaud and there will be a cutscene.

Speak with Your Comrades

Go to the quest icons on the map and talk to Yugiri, Lyse, and Gosetsu.

Speak with Alphinaud

Go to the quest icon on the map and talk to Alphinaud to complete the quest. There will be a cutscene.

Next Main Scenario Quest

After you complete the quest, talk to Hien to accept the next quest: The Die is Cast.