From the Cape, Home Riggs Popham assembles an unauthorised expedition against the Spanish colonies of the Río de la Plata. Rumours of silver and local support encourage the British force to seize Buenos Aires despite uncertain orders and inadequate preparation.
Early success collapses when the population organises resistance and the expected political uprising fails to appear. Kydd must navigate shallow waters, divided command and the consequences of an invasion whose leaders have mistaken commercial ambition for local consent.