Daanish Ali (Farhan Akhtar), an ATS officer is happily married to Ruhana (Aditi Rao Hydari) and has a four year old daughter. His happy family life is devastated when his daughter is killed while he is chasing terrorists. While Daanish is recovering for this great loss, he meets the former chess master - Omkarnath/Panditji (Amitabh Bachchan). Both, Daanish and Panditji are suffering from the grief of losing their daughters. Panditji taught the game of chess to Daanish, while trying to console him and take him out of his sorrow. But, Panditji reveals to his new found friend that, his daughter Nina has suffered a mysterious death and, he suspects that the Welfare Minister Izaad Qureshi has brutally murdered her. Daanish takes this case as his own and begins the investigation, when, a mystifying man named - 'Wazir' tries to attack Panditji. Who is Wazir and why does he want to kill Panditji? Also, what is the mystery behind Nina's death? reveals the climax.