S01E01 Frontier Fort
Obsessed with discovering the fate of his father's lost legion, Marcus arrives in Britain to take command of a frontier fort. He makes friends with Cradoc, a British warrior, and all seems peaceful. Then, on...
Badly wounded in the battle, Marcus is discharged from the legion, his soldiering at an end. He goes to recuperate with his uncle Aquila in Calleva. There he saves Esca, a British gladiator, from death in the arena, and from him he hears of the lost legion.
In Britannia in 130, a young Roman officer named Marcus Flavius Aquila and his freed slave Esca search for the Ninth Legion's gold eagle standard, which vanished with the legion 13 years earlier.