Joseph Paxton's quest to save his last known surviving teammate, Lt. Nadia Chavez, has reached a critical juncture.  Being the victim of barbarous experiments conducted by The Store, Lt. Chavez has been transformed into an unstoppable killing machine, laying waste to anything crossing her path.  As the Mexican Government amasses the forces necessary to end Lt. Chavez' rampage, Paxton takes council with his new found, though somewhat reluctant, allies as to determine his final course of action.  Meanwhile, in the United States, the ramifications of the incident at Area 49 along with the mass killings in Mexico have sent shock-waves through the corridors of power.  What reaction will these events prompt from the White House...?  And more importantly for Joseph Paxton...Is a final attempt to save his friend's life possible?