He found peace. He found happiness. Now he must find the truth.

An unseen enemy is pushing the world to the brink of war.

The greatest threat we have ever known just landed on the wrong doorstep.

For two years, Adrian Hell has enjoyed his retirement. But one night, three strangers walk into his life and set in motion a chain of events that will shatter the life he fought so hard to build.

Faces from his past and doubts about his future compel Adrian to pick up his weapons once more. To do what he does best. But when he finds himself in the middle of a large-scale conspiracy that threatens everyone's freedom, he realizes his will to do the right thing might not be enough . . .