When we talk about investigative movies in Tamil cinema, we simply have to mention Jaishankar. He was the first lead actor to do many investigative movies. It is tough to choose one for Jaishankar. CID Shankar maybe a worthy candidate. CID Shankar is about the busting of a racket which is behind a huge number of crimes. The investigating officer has to overcome a lot of hazards including a double crossing co-investigator and his lady love who gets caught up with the racket before succeeding in bringing them down.