From the back cover:
This immersive campaign setting includes dozens of new options for player characters and a myriad of spells, monsters, and magic items steeped in history to bring the world of the first century to life at the table. Cooperative storytelling is as old as the Bible itself, and now you can step into the action! The maps, NPCs, and politics included in this module are reconstructed from multiple historical sources to keep the feel of the setting authentic (not to mention make the GMs life easier!).
Along with the campaign setting you will find an original storyline that opens with a search for the three missing Magi, and eventually brings the party into conflict with both human and supernatural evils seeking the corruption of the world. This campaign runs parallel to the events of the Bible, so many of the people and places may feel familiar, but the plot unfolds in a way that allows the players to tell a story that is all their own!