Who will steal the greatest prize of Empire? South America's Spanish colonies are in a ferment of popular unrest. Rumors of a treasure hoard of Spanish silver spur Thomas Kydd's commander-in-chief, Commodore Popham, to assemble a makeshift invasion fleet and launch a bold attack on Buenos Aires. The British invasion force wins a battle against improbable odds, but soon finds itself surrounded by a hostile population. Now Kydd's men must face resistance and the betrayal of their closest allies...