Kiran wants to make a documentary on tantric practices and pursues Swethamukhi to accompany him to Kerala. When they meet Suryadharman, they discover that Swethamukhi is haunted by an evil spirit.
Watch the full movie, Thanthra online, only on Eros Now. Aravindan and Swethamukhi visit a Mana, a brahmin's residence, to produce a documentary related to tantric practices. The eerie and bizarre events that take place in the Mana forms the story.