Based on Saradindu Bandopadhyay's Byomkesh Bakshi novel Sajarur Kanta is about a series of mysterious murders where the quill of a porcupine pierces the heart of the victim, killing him or her instantly.
It begins with the murder of a beggar, but the peculiarity lies within the murder weapon. Which is a porcupine thorn. Byomkesh Bakshi sets out to find answers and wants to know the murderer's motif and his choice of weapon. Deepa (Konkona Sen Sharma) is a lead actress of a theatre group, her marriage gets arranged to a wealthy Debashis.Their chemistry is crackling but the script doesn't allow the romance to bloom. Moreover, Dhritiman's Byomkesh is quite far removed from the character we know, speaking English with a British accent and effecting theatrical expressions and dramatic entrances. Kaushik Sen's Prabal is intense but falls victim to a poor script. The film is touted as a thriller, but thanks to the poor editing there is little of that thrill left by the time the end credits roll.