Haseen Dillruba is a dark and suspenseful movie that follows the story of Rani who gets entangled in a love triangle and becomes a suspect in her husband's murder. As the investigation unfolds, secrets are revealed and the lines between love and deceit blur.

While evading the cops in Agra, Rani and Rishu scheme to run away together. But when their plans go awry, Rani asks a mild-mannered admirer for help.