The world’s most lethal odd couple – bodyguard Michael Bryce and hitman Darius Kincaid – are back on another life-threatening mission. Still unlicensed and under scrutiny, Bryce is forced into action by Darius's even more volatile wife, the infamous international con artist Sonia Kincaid. As Bryce is driven over the edge by his two most dangerous protectees, the trio get in over their heads in a global plot and soon find that they are all that stand between Europe and a vengeful and powerful madman.

A group of UAC Marines responds to a distress call from a top-secret scientific base on Phobos, a Martian moon, only to discover it's been overrun by demons.