In Episode 3 of Behind Closed Doors, the story continues to follow the investigation into a young girl's brutal murder, which has spiraled into a complex and baffling case. The Central Bureau of Investigation (CBI) initially clears the grieving father of the crime, but as the investigation progresses, the focus shifts to other suspects, including the parents and nearby servants.
A new officer joins the investigation, reinvigorating the stalled case by pursuing both parents despite the lack of hard evidence. The episode delves into the escalating social and class tensions surrounding the case, as the parents find themselves tried for murder. The narrative explores themes of justice, prejudice, and the lengths to which investigators will go to uncover the truth .