Julie Welch’s sister, Fay Lariviere, disappears from their hotel in Morocco. Although she leaves a note that she’ll be back in two days, Fay doesn’t return. Julie’s anger shifts to worry --- and to fear when she discovers a stalker. Then, an attack meant for Julie kills another woman. Searching Fay’s luggage and quizzing the hotel staff, Julie discovers Fay’s destination --- a remote village in the Saharan desert. Convinced her sister is in danger and propelled by her own jeopardy, Julie rushes to warn Fay. By the time she reaches the village, Julie finds that Fay has traveled deeper into the desert. With a villager as her guide, Julie follows, only to be stranded in the Sahara when the guide abandons her. Julie is eventually reunited with Fay --- in a prison cell --- and learns the reasons for Fay’s secrecy.

Luz Concepcion returns to Guatemala to murder Martin Benavides, the man who destroyed her family. Benavides, who rose from insurgent fighter to president, controls a major drug network. Richard Clement became Luz’s resettlement officer when she was evacuated to the U.S. He now works for the CIA, which has its own reasons for eliminating Benavides. Richard’s team persuades Luz to pursue a job as nanny to Benavides’ grandson, Cesar, a lonely child with an absentee playboy father. The Guatemala contact for her mission is Evan McManus, an expat painter who pursues Luz, hoping to persuade her to model for him --- and more.