AD 40. Roman naval officer Marcus Fronto and his colleagues are progressing overland to unknown territory somewhere near modern Chester. They are conducting a survey and informal reconnaissance with the secondary objectives of cultivating local chieftains and identifying strategic mineral deposits. It is an unknown, largely undifferentiated, land. So sailorly skills come in very handy. The British tribes are at war, are divided in their attitude to Rome, and besides these many unexpected perils confront Marcus and his shipmates. Not to worry,... Caligula has their back...