Though suspicious of your intent, Angry Coeurl asks you to retrieve something from his little brother.
This quest is available if you have completed the quest The Prodigal Daughter.
Starting the Quest
Talk to Angry Coeurl in Ala Gannha in the Peaks to begin the quest.
Speak with Frightened Coeurl
Go west through the village gate, then go southwest to where the orange arrow is pointing in the minimap. Talk to Frightened Coeurl to proceed.
Pick up the Sacks
Check on the sparkling Unconscionably Heavy Sacks to pick them up.
Deliver the Sacks
You can either teleport back to Ala Gannha or you can go northeast the way you came. Go to the quest icon on the map and talk to Angry Coeurl to hand over the Unconscionably Heavy Sacks and complete the quest.