Julius Caesar is dead, assassinated on the senate floor, and the glory that is Rome has been torn in two. Octavian, Caesar's ambitious great-nephew and adopted son, vies with Marc Antony and Cleopatra for control of Caesar's legacy.

But as civil war rages from Rome to Alexandria, and vast armies and navies battle for supremacy, a secret conflict may truly shape the course of history: two sons of Caesar have set out on a ruthless quest to find and control the Shards of Heaven, legendary artifacts said to possess the very power of the gods -- or of the one God.

Caught up in these cataclysmic events, and the hunt for the Shards, are a pair of exiled Roman legionnaires, a Greek librarian of uncertain loyalties, assassins, spies, slaves . . . and the ten-year-old daughter of Cleopatra herself.