The Unheard follows 20-year-old Chloe Grayden (Lachlan Watson), who after undergoing an experimental procedure to restore her damaged hearing, begins to suffer from auditory hallucinations seemingly related to the mysterious disappearance of her mother.
The lives of six girls belong to different worlds although connected to each other through a doll called Molly, whose existence dates back to 1976, when she appeared among the rubble of the great fire of the San Carlos orphanage, in northern Spain.