Peter delves into Emma's past, which leads to the discovery of a long-hidden, ancient symbol; someone from Debbie's past attempts to rescue her; and Lynn's life is put in jeopardy.

After Peter has a startling breakthrough in the Emma Wilson case, he turns to Golan to search out new clues. A furious Ambassador Ridell pressures Lynn to get Peter out of the country. In the New Mexican dessert, Debbie must make a dangerous trade with Tad Billingham if she wants to spare bloodshed. Rabbi Lev and a new partner work deep in the underground tunnels to carry out their mission.