Senator Marcus Brutus has spent his life serving Rome, but it's difficult to be a patriot when the Republic, barely recovered from a civil war, is under threat by its own leader. Brutus's one retreat is his country home, where he steals a few precious days now and then with Cassius, his brother-in-law and fellow soldier — and the one he loves above all others. But the sickness at the heart of Rome is spreading, and even Brutus's nights with Cassius can't erase the knowledge that Gaius Julius Caesar is slowly becoming a tyrant.

Cassius fears both Caesar's intentions and Brutus's interest in Tiresias, the villa's newest servant. Tiresias claims to be the orphaned son of a minor noble, but his secrets run deeper, and only Brutus knows them all. Cassius, intent on protecting the Republic and his claim to Brutus, proposes a dangerous conspiracy to assassinate Caesar. After all, if Brutus — loved and respected by all — supports it, it's not murder, just politics.

Now Brutus must return to Rome and choose: not only between Cassius and Tiresias, but between preserving the fragile status quo of Rome and killing a man who would be emperor.