Mard Ki Zabaan is an action drama. The movie revolves around a man named Laxman (Dharmendra), who lives with his brother Ram, a farmer. Laxman falls in love with a wealthy woman named Laxmi (Sushma Seth), and despite the objection of her father, Raghupati (Shreeram Lagoo), the two get married. Laxmi then gives birth to Vijay (Jackie Shroff), meanwhile, Raghupati makes Shrinath his sole beneficiary. When Laxman tries to object, Raghupati gets him beaten up, and kills Ram, while Laxmi is separated from her son. Later, Vijay is adopted by another man, who renames him as Rajesh. Laxman, who is in prison for killing some of Raghupati’s men, decides to take revenge from Raghupati and Shrinath, who jointly destroyed his family. Will Laxman succeed in his mission and also reunite with his son?