To ex-P.OW. Mark Stone it is a matter of honor. The government could bury the Vietnam war but not America's forgotten heroes -the soldiers listed as M.I.A. A former Green Beret, Stone will keep searching until every missing fighter-dead or alive -has been accounted for. Combat reporter Jackie Winslow has proved herself in life-or-death stuations all over the world. Now she needs Stone's help. Her father, a military doctor, has been spotted in a slave camp deep in the jungles of Laos. Washington is calling him a traitor -but with Stone, Hog Wiley. and Terrance Loughlin leading the way, she is ready to crawl through hell to prove them wrong.