Until you've been pushed past your limits, you don't know what you're capable of.

When a terrorist group brings down three passenger jets, CIA Threat Analyst Jessie Coltrane is plunged into a netherworld where it's difficult to tell friend from foe. Nothing is what it seems. Case in point? Darien Troy, the beautiful but deadly operative brought in to help neutralize the threat. Jessie is drawn to Darien. She's just not sure she can trust her.

Darien's never backed down from a challenge, but this one's suddenly very personal. As the body count increases and old secrets come to light, she'll have to decide how far she's willing to go. Because this time, more than survival is on the line.