Bob Lee Swagger, a retired United States Marine Corps Scout Sniper, lives in self-imposed exile following a mission gone tragically wrong. He is coaxed back into service to help prevent an assassination plot against the president. Swagger is approached by Colonel Isaac Johnson, who outlines a plan purportedly to safeguard the president. Utilizing his unparalleled skills, Swagger formulates a plan and pinpoints how the assassin could potentially make the shot. However, he soon discovers that the entire operation is a setup; he's been framed for the assassination attempt. Swagger narrowly escapes an ambush, realizing too late that he's been drawn into a deep conspiracy.

Now on the run and wanted for a crime he didn't commit, Swagger must use all his training and survival skills to evade capture by the authorities, including FBI agent Nick Memphis. As he tries to clear his name, Swagger begins to unravel a complex plot that goes much deeper than he could have imagined. The conspiracy involves corrupt government officials and leads him into a dangerous world where one false move could be his last. His journey takes him across the country as he pieces together clues and seeks help from unlikely allies. Determined to expose the real culprits and bring them to justice, Swagger's quest not only aims to clear his name but also to reveal the truth behind the sinister plot he inadvertently uncovered.