Kanalkkattu

'Nathu' Narayanan, a small-time thug who does anything for money, takes money from contractor Ayyappan Nair (Oduvil) & gangster Karim (Keerikkadan) to beat up Assistant Engineer Benny (Jayaram). Things get out of hand & Benny dies. Nathu is devastated when he finds that Benny was the husband of Asha (Urvashi), a lady he knew & helped once before. A penitent Nathu helps out Asha & gives up his life of crime, but soon the cops investigating the murder get hold of clues which links Nathu to it. (Summary by iceblox)