A terrorist threat comes to Rome ... the Mossad is on the hunt to thwart the attack, only to discover Halo is the bomb.
Halo moves to Rome to mentor a new agent. On a routine informant contact, Halo is ambushed and taken prisoner. The search for her lands in the lap of her rookie agent, Blackbird. With a small team, Blackbird goes on the hunt to find her partner. She soon discovers the terrorist threat wants to destroy one of the Vatican's most cherished treasures.
What makes the search horrific is the bomb will not only be devastating, but Halo is the fuse.