The main character named Bob Lee Swagger, discreet Sergeant of Marines. He is the only sniper in the world that can hit a target from a distance. Now the main character leads the life of a hermit and lives in his house in the mountains. But Bobby has no idea what is already embroiled in a conspiracy where you have to kill the President. It looks like the main character want to expose and surrender to the authorities. So now Bob has the task to find as soon as possible the real killer.