Evan Smoak - former government assassin, 'Orphan X', turned white knight of last resort - is planning on hanging up his gun.

Then he gets one last call.

Max Merriweather has lost his wife, home and career. Now it looks like he's going to lose his life. A murdered cousin has left him a package and a team of assassins on his trail . . .

Nothing Evan can't handle.

If it weren't for the fact he's carrying a brutal concussion that's made him vulnerable. Or that the simple job of keeping Max safe quickly escalated into a mission unlike anything he's ever encountered.

But as Evan's problems mount just one thing is clear: he is now in the most dangerous position of his life . . .