An undercover cop tries to foil the plans of an unrepentant criminal, who tries to supply an extremely dangerous chemical to terrorists for money. Sandamarutham shares some similarities with last week's release Anegan, and this week's Tamizhukku En 1-Ai Azhuthavum. As with the latter film, here too, a terrorist conspiracy is what drives the plot forward. And, like Anegan, it has a plot that is pretty preposterous. Interestingly, both films have been co-written by writers who are who are known for their crime thrillers — if it was SuBa in the former, here, it is Rajeshkumar. And, here too, various concepts are thrown around — silastic gel, shadow wing cops, silicone fishes, a mystery chemical that is a MacGuffin, plastic surgery, terror plot to bomb 101 cities, The Mahbharata's Chakravyuham and so on. But, while Anegan used these elements to cook up a pulpy thriller, this one takes a more conventional approach where the plot is largely in service of its star.