Soon after discovering that the Bible's Old Testament left out a revealing passage about the Israelites' exodus from Egypt, computer wizard Steve Fisher comes across the name of his deceased grandfather, Clarence Fisher, in a popular mystery novel.

Eager to learn more about his grandfather, an archaeologist who died mysteriously, Steve sets out on a sixteen-day trip through Egypt, accompanied by his brother, Glenn, and a striking and brilliant archaeologist named Tina Gilbert.

The trio uses a map that Clarence drew by hand during his college years to search for an...