The Eagle of the Ninth takes place in Britain in A.D. 117. Marcus, the protagonist, incurs a wound in his first battle and is forced to resign from the army. His father's legion, the Ninth Hispanic, marched north to Scotland nine years before on a mission to quell an uprising among the Caledonian tribes beyond the Roman wall. The legion disappeared, and rumors about this mysterious disappearance have tarnished the legion's reputation. With his freed slave, a Briton named Esca, Marcus sets off on.....