Gosetsu will attempt to discern the Dotharl's plans for the Naadam.
This quest is available if you have completed the quest The Undying Ones.
Starting the Quest
Talk to Gosetsu in the Azim Steppe to begin the quest.
Speak with Sadu
Go to the quest icon on the map and talk to Sadu. There will be a cutscene.
Pay Your Respects
Go west to where the orange arrow is pointing in the minimap. Go to the western half of the orange circle on the map. Dismount and enter the purple circle, and kill the three Gedan Corpsestealers that attack. Afterward, check on Geser's Corpse. There will be a cutscene.
Speak with Gosetsu
Talk to Gosetsu to complete the quest. There will be a cutscene.
Next Main Scenario Quest
After you complete the quest, talk to Gosetsu to accept the next quest: As the Gods Will.