Nigooda Rahasya is a 1990 Indian Kannada-language suspense thriller film, directed by Perala and produced by Jagadish Malnad and Kashinath Chindupurge. The film stars Shankar Nag, Geetha, Vanitha Vasu and Tara in the lead roles. The film has musical score by Hamsalekha. The movie was released after the demise of Shankar Nag. His brother Anant Nag dubbed for Shankar's character. The core thematic plot of the movie is based on the legend of Naale Baa.