Surprise sails east across the Pacific while Jack Aubrey operates as a privateer and Stephen Maturin prepares to support independence movements in Spanish America. Their plans are disrupted by accident, hostile ships and political divisions among would-be revolutionaries.
In Peru, Stephen tries to turn local resistance into a strategic advantage for Britain without surrendering control to ambitious allies. Jack’s naval engagements and Stephen’s covert campaign bring the voyage toward South America’s anti-colonial wars.