In 43AD when the Romans invaded Britain, Kerra, daughter of the King of the Cantii, is forced to put her differences aside with arch-rival Queen Antedia to face their invaders. The Romans, led by General Aulus Plautius, are determined to succeed where Julius Caesar failed – and conquer this mythical land at the far edge of the Roman Empire. Aulus is a strong and resilient leader, but harbors a deep secret that threatens his mission. As tribes and Druids unite to fight the Romans, Kerra spearheads the resistance against the might of the Roman army.