A business tycoon family's two brothers Vijay & Arjun Ranawat, who have enemity with a Criminal Don Kabir Chopra. Kabir forcefully wants the partnership in Vijay & Arjun's construction company "Sharda group of companies" but Vijay and Arjun don't bow to his demand because after many long-long hardships they have established the company. Both the brothers take the Kabir's challenge and warn him of any foolish attempt. But Kabir underestimates them and he wages a war against them. In the course of this war Vijay's brother Arjun is killed by Kabir's orders being in the Jail. Now Vijay challenges Kabir that before coming out of Jail he should order the wood and Ghee for his pyre because the same day he will have to go to the Shamshaan(cremation ground). Vijay is furious on his brother's death and plans everything so precisely that he successfully completes his challenge and takes his brother's revenge by killing Kabir on the very same day when he comes out of the jail. In front of Kabir's burning pyre Kabir's 14 year old son Raj Chopra takes the vow of finishing Vijay Ranawat's whole family. After about 9-10 years Vijay's sons Suraj & Veer and Arjun's son Akash become young and takes over the business. One day Vijay dies in plane crash and all three brothers run the company successfully. Raj along with a girl Ayesha plans to ruin Vijay Ranawat's family, on the other side Akash also wants to grab Suraj and Veer's property and makes a plan along with his girlfriend Tina to kill his brothers. Ayesha is the daughter of Mukesh, ex-manager of Sharda group of companies who was thrown out of the company on theft charges. According to their plan Ayesha becomes the girlfriend of Suraj to take her revenge, as well as to make Raj Chopra's plan successful. One day Akash plans to kill Suraj and Veer in a club. When Akash is just about to shoot Suraj and Veer some body else kills them. Akash gets the shock of his life. Now somebody starts Black mailing Akash by showing him the video clipping of his aiming to kill Suraj and Veer. Now the real mind game starts Between the blackmailer and Akash. What happens to Akash.... Who is the blackmailer of Akash.... what happens to Raj and Ayesha's planning to ruin Ranawat's family and does Akash succeed in grabbing his brother's property, all these answers we will be getting in the climax of "Smart Killer" .