Assignment Sahara: Chad and Sudan puts Janine Simms, an experienced CIA operative, into one of the most dangerous assignments of her career. She is sent to Chad, Central Africa, under the auspices of the American Embassy, ostensibly to oversee the delivery of food and medical supplies to refugees from the Darfur region of Sudan. Her real mission is to search for the missing daughter of a U.S. senator. The girl, Lilli, has mysteriously disappeared from a church group providing aid to the refugees. Janine's search takes her north to the uncharted Tibesti Mountains of Chad, an insurgent stronghold, to look for the girl. She is aided in her task by Brax, an experienced bush pilot, and Lilli's father, the irate senator, who will risk anything, even forcing the group to deal with terrorists, to rescue his daughter.