Dan Sylvester, a former Continental Airlines pilot who now flies an amphibious plane he calls Bluebird, is in trouble again. This time with Penny Davies, a beautiful but baffling nurse sometimes angel, sometimes devil in the Azores, nine windswept Portuguese islands in mid-Atlantic. Hired as a pilot for a wealthy but ailing Don with three vineyards and two feuding sons, Dan tries to keep the winemaker's empire out of the hands of a cunning arms dealer with no scruples who seeks vengeance from his former partner for stealing money from him during WWII. Money they both earned smuggling guns in the Azores for the Allies.