Inspired by a true mining tragedy at the Chasmala Mines in Bihar, which claimed hundreds of lives. With the first rays of the rising sun, the miners go down so deep into the coal mine that their voices are stifled in the bowels of the earth. Even in their wildest dreams they cannot escape to achieve the reality above ground. When disaster strikes there are three men that stand up to fight for justice for these labourers who risk their lives as part and parcel of their existence. Vijay (Amitabh Bachchan) an ex-naval officer who has been court martialled and dismissed from the navy. Vijay is now working at the coalmine. He welcomes every sign of danger and adversity in an attempt to combat the demons within, and pay for an act of cowardliness as the captain of a sinking ship. Ravi (Shashi Kapoor) is an engineer in charge of the doomed project, due to the negligence and greed of its owners. Ravi tries to alert the management and the workers, to the impending disaster, but in vain. Ravi joins forces with the workers and Vijay in order to save the lives of his fellow workers and fight the establishment. Mangal (Shatrughan Sinha) is a runaway convict who finds shelter from the hands of the law at the coalmine. A boisterous and egotistical man, who finds that there is a compassionate human being within him, and ends up joining the quest for justice. 'Kaala Patthar' is a film about how different people from different walks of life and backgrounds come together and show true courage and character to fight the forces of nature in what is a losing battle.