The son of a wealthy man suffers from a condition whereby he cannot stand the sight of fire as he has a violent outburst every time. A caring doctor and a friend help the young man unravel his past.

Shanmugakani (K. Bhagyaraj) arrives in the village of Thaayamangalam as the new school teacher and soon falls in love with a local damsel Jothi (Rati Agnihotri). The village head called as “Periyavar” (played by G.Srinivasan) is a lecherous and sinister man who has a lustful eye on Jothi. Amavasai (Goundamani) is Periyavar’s stooge who also has a long-standing desire to marry Jothi. Periyavar frames Shanmugakani for the rape and murder of a woman social activist and gets him evicted from the village and gets Jothi married by deceit to Amavasai. He asks Amavasai and Jothi to stay with him in order to satiate his lust with Jothi. What happens afterwards forms the rest of the story.

Kaaliyan and Jaishankar are like dictators in neighboring villages separately, but in contrast to Kaaliyan, Jaishankar is selfish and bad. Engagement of Jaishankar’s sister with Kaaliyan triggers rivalry between the two villages.

A simple girl rises to be a big star, but the story of her success is not without its dark side.

Majnu (Tamil: மஜ்னு) is a Tamil-language Romance film which is Directed by Ravichandran & performed by Prashanth, Rinke Khanna, Rati Agnihotri on and Released 21 December 2001.