Lower-level cabinet member Tom Kirkman becomes President of the United States after a catastrophic attack on the U.S. Capitol. Kirkman must keep the country and his family safe while leading the search for the those responsible for the attack.

President Kirkman fears there could be a traitor in the White House when he discovers shocking information connected to the Capitol Bombing. Confiding in Emily, Kirkman puts her in charge of quietly investigating. New information surfaces about Congressman MacLeish, raising concerns regarding his vice presidential nomination.

Circles must tighten as a new discovery within the conspiracy emerges. Tension rises between Aaron and Emily as suspicions loom in the White House. A new lead places Agent Wells closer than before to the truth.

In the nail-biting season finale, Hannah Wells must stop the conspiracy from carrying out a final attack while President Kirkman authorizes a nationwide manhunt for the mastermind behind it all.