Based on the novel Magno Mainak by Sharadindu Bandyopadhyay, the film portrays the iconic Bengali detective Byomkesh Bakshi along with his friend Ajit Bandyopadhyay as he investigates the murder of a Pakistani spy named Heena Mallick. He begins the investigation at the request of a political leader, Mr. Santosh Samaddar, who was a close friend of Heena's parents and had given her shelter after her parents' death. Will Byomkesh succeed?
| Directing | Sayantan Ghosal | Director |
| Writing | Anjan Dutt | Screenplay |
| Writing | Sharadindu Bandyopadhyay | Author |
| Camera | Ramyadip Saha | Director of Photography |
| Costume & Make-Up | Sabarni Das | Costume Design |
| Costume & Make-Up | Subir Manna | Makeup & Hair |
| Sound | Neel Dutt | Music |
| Editing | Subhajit Singha | Editor |
| Art | Tapas Sarkar | Art Direction |