Lashkar is an action crime drama. The movie revolves around a professor named Anand (Dev Anand), who lives a wealthy lifestyle with his wife, son and sister, Barkha. Barkha is engaged to Inspector Sumeet (Sumeet Saigal). Anand comes across a smuggler named Sangram (Kiran Kumar), and Sumeet arrests him and presents him in court, where he is discharged of all charges. Later, Sangram’s men kill Anand’s wife and son, and molest Barkha, which leads to her losing her memory. Thereafter, Anand and Sumeet join hands to fight against Sangram Singh. Will the duo be able to put a stop to all the ill doings of this goon?