Assume the worst. Code Black.

The White House has been breached. President Kline has left for a secret bunker with only his most trusted agents and officials: those dedicated to keeping the US government intact at all costs.

Erik Hill has given his life to the Secret Service, but years of dealing with Washington sleaze has replaced his enthusiasm with disillusionment. With the US government under attack, though, and no one better equipped to face down the threat, Erik can't ignore his calling.

But he has never dealt with a threat like this. The president may have headed to safety… but what if the danger was there with him all along? With killers ready to strike inside the bunker, it will take everything Erik has to save his leader, his country - and himself.