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.

When shots ring out at The White House during a Governors Summit, President Kirkman's 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.