Inder Singh belonged to Mala village of Ludhiana district of Punjab. His father’s name was Ala Singh. He was a deeply religious person. He was sentenced to transportation for life in the First Lahore Conspiracy Case. A returned emigrant, he was influenced by the Ghadar Party's ideology. Ghadar Party was established in San Francisco by the immigrant Indians, mostly Punjabis, under the presidency of Sohan Singh Bhakna. Party published a weekly paper Ghadar criticizing the evils of British imperialism. The paper was edited by Har Dayal and Kartar Singh Sarabha. With the outbreak of WWI, the Ghadar Party called on its cadre to return to India and fight for Indian independence. Indar Singh moved to India and became involved in the Ghadar Party's programs. Party decided to start the rebellion on 21 February 1915. However, Sir Michael O’Dwyer, Governor of Punjab came to know about the whole scheme of the rebellion. Authorities arrested many ghadarites. Inder Singh was apprehended and sent to the Lahore Central Jail, where he was tried in the First Lahore Conspiracy Case. Under the Defence of India Act 1914, the trial began on April 26, 1915, and the verdict was delivered on September 13, 1915. He was charged with violating sections 121, 121A, and 124 A of the Indian Penal Code and sentenced to life transportation with property forfeiture.