Khazana speaks to you through muted expressions and stifled screams. It tells the story of a mistreated wife who is tortured to the point of a horrifying albeit grand climax. It repulses you with its socio-cultural walls, invites you with an ever-tightening grip, and then plunges you into a purgatory.
The protagonist suffers closed-doors domestic abuse and lives in a shell impenetrable to empathy. Vaidehi is entangled in a loveless marriage with Amar who does little to veil his affair with Neelima. His mother disdains Vaidehi's humble origins and pushes Amar to abort his own child. He complies without remorse by blackmailing the local doctor Arun, played by Nath himself.
Vaidehi's plight is not an extreme or obscure example of what long-standing gender inequality assails on the life of women around the world. Her reaction to it, however, impresses and abhors you in equal measure.
Khazana wraps around you with references to itself. You'll ask questions which will fall to the deaf years of a smiling young woman. Vaidehi's revenge is a disturbingly delicious consummation which will bring you back to watch the movie again. I promise.