In 1929, Bhagat Singh surrenders after a daring bomb attack in the heart of Delhi's assembly. Behind bars, he prepares for an ideological battle against the empire. However, a shocking betrayal shatters his world. Phanindra Nath Ghosh, a trusted comrade, becomes a British approver, revealing every secret of the HSRA. His damning testimony leads to multiple arrests, and then the British hang Bhagat Singh, Rajguru and Sukhdeo. Popularly known as the 'king's witness', he had singlehandedly brought on an armed revolution.