Investigating a strange meteor crash in the Amazon, Gina, Brianna, Seance and Genn are surprised to find metal components in the debris - with some of Gina's recent personal serial numbers on them! Before Gina can put the pieces of the puzzle together, the group stumbles upon the remains of "SETI Alpha-Five", Madrid's one-time prison, and the "X-mark" of one vicious ambush!