What is "nidhanaya"

Nidhanaya is a 1972 Sinhalese language film directed by Lester James Peries, starring Gamini Fonseka and Malini Fonseka. Movie is based on a short story written by G.B.Senanayake in one of his short story collection known as "The Revenge". It revolves around a murder which is committed for the purpose of gaining access to a hidden treasure. The film won the Silver Lion of St. Mark award at the 1972 Venice International Film Festival and was also selected as one of the outstanding films of the year, receiving a Diploma, at the London Film Festival. It was also chosen as the best film of the first 50 years of Sri Lankan cinema.