But midway, the film turns into an investigative thriller, focussing on Irfan (Kalanjiyam), an officer from the economic offences wing who is tasked with the case of the missing idol. Does he capture the elusive Ram Sanjay, or does the criminal outwit the cop?
The best parts of Kalavu Thozhirchalai are the portions when Sanjay and Kathir try to steal the idol. These scenes are suspenseful and well shot, with the art direction by Murali Ram, especially, lending an authentic feel.
However, the rest of the film is more or less a let-down, turning what should have been a thrilling heist movie into a slow-moving film filled with unnecessary sub-plots. Even in the first half, Krishnashamy wastes too much time with the romance, which, he could have easily conveyed in the space of a song.
It is in the second half that the film truly unravels. The investigation scenes lack moments of deduction and almost everything that Irfan manages to discover feels like a coincidence. To make matters worse, the film abruptly stops for a song about football that has no place in this narrative. By the time we get to the end, we are quite exhausted to care.