Hannibal's supply lines are the reason Rome first landed troops on the Iberian Peninsula during the Second Punic War, and this film traces what followed over the next seven centuries. It covers the brutal Cantabrian Wars under Augustus, fought to finish the conquest of the peninsula's mountainous north, and the engineering that followed once the fighting stopped. At Las Médulas, Roman engineers used a technique called Ruina Montium, flooding tunnels to collapse entire hillsides in the search for gold, reshaping the landscape in ways still visible today. The Aqueduct of Segovia stands as one of the surviving markers of Roman infrastructure built to serve new cities across Hispania. Those cities went on to produce emperors Trajan and Hadrian, native sons of the province who rose to rule the empire that had conquered their homeland. The film moves from battlefield to mine to city street, using landscape and monument footage to track how Rome's presence in Spain built toward its own eventual collapse.