Lakshana

revolves around a music troupe of youngsters named 'Red Army'. Headed by its mentor Captain Mukundan Menon, the group's real operations are to loot and kill people who have amassed wealth through wrong means and to cleanse the world of crime and injustice. Manu (Bala), a naive guy from Vagamon and son of a driver working for R. K. Nair, a rich planter, loved Meenakshi (Sreedevika), an innocent girl. But Meenakshi was raped by the planter and his accomplices. Being loyal to the master, Manu's father took the blame upon himself and got arrested. Things took a different turn when his father committed suicide in jail under suspicious circumstances and Meenakshi went missing. Manu then took up arms to avenge R. K. Nair and his men, but was beaten and left badly wounded in a desolate place, where he was found by the troupe members. Manu, who is later inducted into the troupe, gets a new name, Harikrishnan, and becomes active in the troupe's activities. What happens next forms the rest of the movie.

Sivakaasi (Vijay) is a short tempered youth working at a welding center, who has fallen in love with Hema (Asin). Her family accepts him as a do-gooder, in spite of his impulsiveness. However, one day, he thrashes Hema`s brother making Hema yell at him. At this, Sivakaasi is compelled to narrate his past to Hema. His past does not pacify Hema completely, but she only says that she will marry no one but him only after he gets the approval of his family. Now, Sivakaasi, who has been growing up like an orphan so far must return to his roots to make things right and to tie the ends he had left loose years ago.