This intelligent drama follows a group of medical scientists as they attempt to find the cause behind the dreaded yellow fever. It is just after the Spanish-American War, and Stone (playing Major Walter Reed) is head of a medical staff stationed in Cuba. Convinced he has found the
carrier of yellow fever (nicknamed "yellow jack" by the men), Stone needs five volunteers from the US Army to serve as human guinea pigs. Montgomery heads up the enlisted volunteers, understanding well the unknown dangers of what he is about to undergo. Montgomery is bitten by some mosquitos
carrying the yellow fever; three others stay in a "dirty room;" the fifth must sleep in the bed of...