A former Marine sniper who discovers a plot to kill the president is drawn into a clandestine operation to keep the commander in chief safe.
After joining his former marine unit for an awards ceremony in Frankfurt, Bob Lee Swagger and his wife Julie must escape a deadly terrorist attack. FBI Agent Nadine Memphis accepts a new job.
Aided by Agent Memphis on the ground in Germany, Bob Lee investigates the terrorist attack that seems to have targeted members of his marine unit.
Bob Lee finds Isaac Johnson on his doorstep in West Texas, and learns how Isaac barely escaped an attempt on his life. In DC, Nadine discovers just how much influence Patricia Gregson wields.
Bob Lee and Isaac discover the world's greatest assassin is now on American soil. Julie finds a new coping method. Nadine shows up to Swagger ranch to share suspicions of a military conspiracy.
As Bob Lee works to piece together Solotov's motive for targeting their unit, he and Isaac turn to an unexpected source. Nadine uncovers a surprise witness to the event in Afghanistan.
Bob Lee and the boys go after Solotov's money, squaring off with a powerful criminal organisation south of the border in the process. In Texas, Julie makes her frustration heard with a gun.
Bob Lee and Isaac must work together to escape a Mexican prison before Solotov finds them. As Nadine digs deeper into Atlas, the cover up points back to a member of Bob Lee's unit.
Bob Lee leads Solotov in a deadly game of cat and mouse to draw him into the open, but soon realises the Chechen has had the upper hand all along.