Allu, Surya, Omar are three friends. One day, accidentally, they happen to meet Zacharia, an old man and Sisily, a young woman. After sometime all of them comes to a conclusion that all are playing a game inside them, planning vigorously to win the game.
Meanwhile, ACP Zakir Ali and CI Abraham Koshy enter the scene with respect to an investigation. Now, what happens when all of them happen to meet forms the rest of the story. Devadevan, son of actor Vijayaraghavan, plays an important role in the film as Allu, thus making his debut in the film industry.
Nedumudi Venu plays an extraordinary character in this movie. The rest of the cast include Arjun, Basil, Henna Bella, Krishnakumar, Thalaivasal Vijay, Jagadeesh, Devan and many others in supporting roles.
Gamer is produced by Tommy and Sanu under the banner of Black Panther Productions. Narayan Swami has done the cinematography. Music has been scored by Shaheen Abbas. Sujith Sahadev has done the editing for the film.