As the head of the government’s secret Vigilance spy program, computer guru China Mack already has her hands full when her billionaire boyfriend, Jackson Cooper, asks for one of them in marriage.

Thrown for a loop by the sudden proposal, China’s usually well-ordered life takes another hit when someone tries to assassinate the president. Even that comes with a shocking twist: the primary suspect is none other than her ex-partner, Clark Slattery. With nowhere else to turn, the sexy loner needs China’s help and expertise. Clark has linked the assassination attempt to a failed secret operation undertaken six years ago—and a deadly cover-up that’s putting the leader of the free world in the crosshairs. But the president isn’t the only one in harm’s way.

Now, China is going to have to dig deep for information that’s beyond even her clearance. And what she discovers may have far-reaching consequences for her life and everyone else in it.