Searching for the origin

The player gets this quest from Master Low automatically after completing Seeking help in Fairmont.

Task
"I spoke with Aaerie again. She told me the key to Gemea was located in the Old Kingdom to the west."

Go to the Sunderwind Wilds to the broken stone bridge near Springmoor. A cutscene will play and the quest will be complete. You will get the next story quest Find help at the village.