The year is 1742, and Edward Mainwaring, the courageous American seaman who defended the honor of the Crown in "Royal Yankee" and "The Golden Galleon", is called to rough seas — this time to thwart a possible defeat in the Mediterranean, where French and Spanish fleets have threateningly joined together in Toulon Harbor.Once again pitted against his brutal nemesis, the cunning and dishonorable Chevalier Rigaud de la Roche-Bourbon, Mainwaring faces his most daunting assignment to storm and conquer the vast French naval fortress.