Talk to Leepe-Hoppe a few days after completing Tuning In to receive this quest.
Travel to Kazham and speak with Jakoh Wahcondalo (the Chieftainess) and then go to the Mihgo's residence and speak with Romaa Mihgo. She will ask you to travel to Gemini Falls in Yuhtunga Jungle. There, you will see a ??? overlooking the falls and some pools of water (K-7). Click on the ???, watch a cutscene, and fight the five spawned NM bees called Nasus.
Once defeated, re-examine the ??? and watch another small cutscene before travelling back to Kazham to speak with Romaa Mihgo again.
The Mithran Tracker has taken the new tuning fork and left for a fabled protocrystal said to exist in the Northlands. She has failed to return. Assist Ildy-Goldy in gathering information about the tracker's whereabouts.