Purandar Pandey, Byomkesh sets out to find the secrets surrounding Ramkishore, a buried treasure hidden within his ancestral hilltop fort and the series of unnatural deaths in the Singha family. Byomkesh navigates through a web of perplexing incidents, each marked by an unnatural death. Are these deaths mere accidents, or are they part of a sinister plot? Byomkesh's quest for truth and justice will test his wit and determination like never before. Dev portrays the character of Byomkesh Bakshi, the legendary fictional detective for the first time in this film. The Screenplay and Dialogues have been penned by Subhendu Dasmunshi, while the Cinematography is by Subhankar Bhar. The Editing is by Sumit Chowdhury and Music & Background Score is by Diptarka Bose. Saswati Karmakar. Shyam Sundar Dey on behalf of Shadow Films stated that they aim to present a thrilling cinematic experience that will focus on the intriguing world of Byomkesh Bakshi. It has been a joyous and collaborative effort, and they are confident that viewers will be spellbound by the edge-of-the-seat narrative. "Byomkesh O Durgo Rahasya" hits the screens on 11th August, 2023 across the leading single screens and multiplexes of West Bengal.