Adharvam movie is all about anantha padmanabhan(mammootty) who born to an aristocratic brahmin father and a shudra mother, that quickly learns and masters all 3 Vedas and allied arts of it. but sadly he and family goes through a whole lot of trouble as the narrow minded brahmin community finds out that the man is in love with an aristocratic girl, which ends up in tragedy upon ananthan's family. to seek revenge for his mothers death, the man learns ancient mystic tantric rituals and the 4th Veda (generally related to sorcery and stuff). He puts a menace on the whole society using his powers that he gained over years and his dad's second son is send to save the society and the village from the clutches of this austere man inflicted with vengeance.