Tom Kirkman is a lower-level cabinet member who is suddenly appointed President of the United States after a catastrophic attack on the U.S. Capitol during the State of the Union. In this dramatic thriller, Kirkman will struggle to keep the country and his own family from falling apart, while navigating the highly volatile political arena and while leading the search to find who is responsible for the attack.

Hours after the attack on the Capitol, President Kirkman steps into his role as Commander-in- Chief in the midst of chaos and confusion. Facing dangerous new challenges and adversaries, Kirkman struggles to hold a country together that is on the brink of falling apart.

President Kirkman and his staff work to keep a high-level security breach of the White House a secret just as he's about to give his first television interview. Meanwhile, the FBI continues to investigate the Capitol bombing, and Agent Hannah Wells starts to develop her own theory about who was really behind the attack.

Kirkman learns who is behind the attack and needs to grapple not only with the prospect of war but brewing domestic troubles as well. Kirkman taps Emily to monitor the domestic situation while Alex may be in for more than she bargains for when she seeks out help from Hookstraten.

Realizing his attempts at diplomacy with Algeria have failed, President Kirkman makes the difficult decision of sending Navy SEALs on a mission that will define his presidency. Meanwhile, as the investigation into the Capitol bombing continues, Agent Hannah Wells discovers more secrets than answers.

When shots ring out at The White House during a Governors Summit President KirkmanΓÇÖs plans at electing a new Congress are thrown into turmoil while Agent Hannah Wells continues investigating the Capitol bombing and makes one of her most shocking discoveries yet.