Druid and the Elephant

The Roman empire has occupied the island of Britannia with its war elephants and legions, suppressing the local tribes. In response, a young boy is sent to Rome to infiltrate the occupying army and learn its ways to help the Britons get their revenge. The boy rises fast in the ranks and learns well, seemingly becoming a perfect Roman soldier. But when news of a rebellion back home, led by warrior queen Boudicca, comes around, he has a choice to make. Will he be able to fulfil the duty he was originally given, or has Roman civilisation seduced him? Whose side is he really on: the homeland that bore him or the Empire that adopted him?