Chris Kyle (Bradley Cooper) was originally an ordinary American cowboy. After the "911" incident, he joined the Navy SEALs at the age of 30 and became an excellent sniper on the battlefield in Iraq. After joining the army, Chris met Taya (Sienna Miller), and the two soon got married and had children, but as Chris went to Iraq many times, many problems occurred in their families. Chris was very good on the battlefield and was called "Legend" by his teammates. Terrorists asked professional snipers to hunt him with high bonuses, but they failed many times. However, his teammates around him encountered accidents one by one. Although his wife repeatedly begged him to retire, he went to the battlefield for the last time with the belief of revenge for his teammates... This film is adapted from Chris Kyle's autobiography "American Sniper"