Watch KAYA: The Mystery Unfolds (2018) : Full Movie Online Free KAYA: The Mystery Unfolds is a Bengali movie starring Kaushik Sen, Priyanka Sarkar and Raima Sen in prominent roles. It is a thriller drama directed by Rajib Chowdhury, with Shamik Kumar Rakshit and Rajib Chowdhury as the writer, forming part of the crew.