Set against the suffocating 48 °C heat of Rohtak, The Rohtak Enigma is a psychological thriller where history and modern forensics violently collide. When renowned archaeologist Dr. Arindam is found dead in a locked environmental chamber, authorities rule it a suicide.
Beside him lies a typed note and his research on the ancient Khokhrakot clay mounds. DSP Abhijeet discovers a chilling anomaly: the fail-safes were locked from the outside. The prime suspect is Neha, a student whose severe Aboulomania makes her pathologically indecisive. To protect her, Abhijeet sends evidence to the State Forensic Science Laboratory in Madhuban.
However, he uncovers a massive conspiracy: the lab's digital infrastructure has been hacked and time-of-death markers actively altered to frame Neha. Stripped of physical forensics, Abhijeet turns to the incorruptible mathematics of forensic linguistics. He proves the note is a forgery, unmasking Dr. Sharma, who weaponized Neha's condition to make her unknowingly trigger the fail-safes. As emphasized by the poignant epilogue, the narrative explores the haunting aftermath: Sharma's unrepentant prison manifesto, Neha's fragile steps through therapy, and Abhijeet finding peace at his fiancée's grave.