It is a tale of two cities--the legendary duel between haughty, democratic Athens and brutal, unbeaten Sparta. After seven years of bloody conflict, a barren island in a remote corner of Greece becomes the stage for what promises to become a second Thermopylae. Four hundred Spartan soldiers are cut off by enemy ships on a narrow strip of land, starving, without supplies, yet sworn to uphold their indomitable heritage. Meanwhile, all around them, the powerful Athenian Navy masses for the inevitable assault.

As the war of nerves wears on, Spartan nobles and Athenian demagogues maneuver in the background--and two estranged Spartan brothers serve together for the first time. The eldest, Antalcidas, is a legendary warrior hobbled by a damaging secret. His brother Epitadas is envied, popular, and cruel. Together they must overcome a lifetime of hostility to survive the battle of their lives.