Based on the life of Chris Kyle, the most deadly sniper of the US Navy seals, the movie is an attempt to show the dedication of a marksman and how he finds it difficult to adjust himself into his life as a civilian. Chris Kyle is a reliable army man and has been assigned serious operations. He is nicknamed legend for the many kills he has made.
Out in Iraq after 9/11 his task is to hunt down al-qaeda leader. While he is much devoted to his work, he also wants to go back to his family; but when he does he is haunted by the thoughts of War and he feels like a misfit in the civil society. But finally after having a son and a daughter when he decides to come back for good and help severely wounded veterans, he is killed by one of them at the shooting range.