What is "nizhalkuthu"

Nizhalkuthu (, , ) is a 2002 Indian film directed, written and co-produced by Adoor Gopalakrishnan. The film explores the recesses of the human consciousness. The film stars Oduvil Unnikrishnan, Narain, Murali, Sukumari, Reeja, Nedumudi Venu, Vijayaraghavan, Jagathi Sreekumar and Tara Kalyan. It premiered on 7 September 2002 at the Venice Film Festival in Italy.