Where to get this case:
The case starts with that weird "Noise" in the Buzz App in the southern part of Ijincho near "Hello World".
Take out your Detector and follow the noise to the north.
Point it to the sky and you can soon identify the culprit drone.
TRACK THE DRONE SIGNAL TO ITS OWNER
Open up your Detector and follow the signal to an alley in the east.
Chase and catch the old man.