Rahasya is a thriller. Film director and producer go to Bakkhali with his newly married wife Alankrita and his friends for a vacation. She meets an astrologer who prophecies that Srijit will kill her in a week. Srijit attacks her and she stabs him in self-defense. Gradually its revealed that it's not Srijit but Alankrita and her boyfriend Prince who are the evil masterminds. Alankrita kills prince .