Returning from Flanders, Diego Alatriste does not abandon his service to the Crown. He is tasked with secretly intercepting a ship carrying contraband from the New World—a cargo of gold that unscrupulous nobles are trying to smuggle in bypassing customs—and delivering it to the king’s people. The matter is the most serious of all. After all, the operation is watched not only by Count Olivares, but also by His Majesty Philip IV.