Tells the true story of a mutt named Nubs, who was befriended by a marine on duty at the Iraqi border and became so devoted to the marine that he followed him on foot to his next post more than seventy miles away.

Chris Kyle, a Navy SEAL, recounts his life and military experiences, discusses his record for the most career sniper kills in United States military history and the bounty placed on his head by Iraqi insurgents, provides an eye-witness account of war in Iraq, shares the strains of war on his marriage and family, and honors his fellow soldiers.