Mr. & Mrs. Smith meets political thriller in this heart-pounding series debut about two undercover flames whose new mission risks exposing their true identities to the world...and, worse, each other.

Caspian Anderson is a translator for the United Nations-or so he's led everyone to believe. No one suspects that mild-mannered Caspian, with his baggy clothes and sensible car, is actually an elite assassin for the US government. And that's just how he wants it.

For ten years, Caspian has worked under the code name Elias for Onyx, a black program deep within the Department of Homeland Security. His latest mission takes him to Switzerland to kill a target tied to a human trafficking ring. There, Caspian stumbles onto a web of conspiracies involving high-level political figures.

Meanwhile, Caspian's girlfriend is starting to pull away, and he wonders whether she may have secrets of her own. The truth is, Liesel Bergmann's a spy. But neither knows the truth about the other...yet. As their covert operations converge, trust becomes paramount. Can they work together to bring down the enemy with their lives-and hearts-still intact?