Speech therapist Lin Wan went to a remote old house for a huge salary to take care of an aphasic old woman.
She soon discovered that the old woman was not unable to speak - she was whispering to the things inside the wall in an ancient language.
Whenever night falls, there are scratches and responses from the wall. Lin Wan began to dream that she was repeating unintelligible words in an unfamiliar voice.
Until she saw herself clearly in the mirror, she was using her lips to utter the cold language of another world: "Found it..."
The secret of the ancient house, the fate of the secret keeper, the ancient malice that feeds on sounds... When she finally understood the warning written in blood, there was nowhere to escape.
Because that bone-eroding murmur has already learned her voice.
