Young Pastor Mark Mercer's search for a treasure—a lost epistle of St. Paul—leads him to Salonika, Greece, and to an attractive young American archeologist, Priscilla Krikorian. An initial personality clash gives way to a serendipitous combining of their respective abilities as they embark on a whirlwind sleuthing adventure that takes them to Seville, Spain. Their budding romantic relationship is interrupted when Priscilla is kidnapped, but Mark devises a bold and clever plan to rescue her. Will it work? And what is the treasure that he brings back to the U.S.?