I Am Listening

"Recording Demon" is wreaking havoc. Wearing a headset, she pointed a professional-level microphone at each shower room and then threatened everyone with her recorded singing voice. During an operation, Detective Q successfully arrested the "Recorder Demon", but when he returned home, he received a threatening letter from the "Recorder Demon" and a piece of his own terrifying singing voice. To prevent his sound from being made public, Q followed the instructions of the "Recording Demon" while pursuing the truth of the incident.
(Source: microfilm-music.hk)