Highly-decorated war hero Bob Lee Swagger is recruited by his former Commander to prevent an assassination of the President.Meanwhile, FBI agent Nadine Memphis investigates potential assassins.

Bob Lee tries to protect his family while incarcerated; and Isaac aims to silence him. In other events, Nadine contacts Bob Lee's wife, Julie, who's dealing with the backlash against her family.

Bob Lee reaches out to Nadine as he evades his pursuers, putting her on to the cop who took credit for his capture. Isaac juggles his double life as he tries to find Bob Lee.

In a flashback to their time serving in Afghanistan, Bob Lee and Isaac clash with opposing ideologies. Nadine investigates the Ukrainian connection, putting herself on the conspirators' radar.

Bob Lee finds the bullet from the assassination, leading him to a radical militia group and a reckoning with Isaac while Nadine is locked in a deadly game of cat and mouse with Payne.

Bob Lee tracks down his former instructor Rathford O'Brien to help him find the shooter. Nadine interrogates Payne and a reporter approaches Julie with a deal.

Bob Lee crosses the country to find the shooter while Julie deals with a family betrayal. Nadine contacts a Ukrainian reporter who can explain the conspiracy. Isaac questions his allegiance.

Bob Lee and Nadine weave a plan to secure the evidence that could expose the conspiracy. Meanwhile, Isaac gropes for an exit strategy, Payne tries to flee, and Julie and Mary face grave danger.

Bob Lee must broker a dangerous exchange in order to save his family. Nadine struggles to balance her allegiances to Bob Lee and the FBI. Isaac strikes a tenuous deal for his freedom.

Bob Lee, Julie, Nadine, and Isaac must work together to breach the Russian Embassy, save Mary, shut down the conspiracy and its remaining players, and prove Bob Lee innocent once and for all.