Michael Caine stars as Dr. David Linderby, half of a married U.N. medical team vaccinating native villages in West Africa. But when his wife is abducted by a depraved Arab slave trader, there's no time for diplomacy. With the help of a human-tracking activist, a cynical mercenary and a vengeful Bedouin, Linderby must pursue his wife's slavers 3,000 miles across the Sahara before she can be sold.