In the 5th century BCE, a group of immortals living peacefully in the Greek city-state of Athens are conscripted into a dangerous war with Sparta. After the first battle it becomes clear Sparta’s famous military prowess is owed to their own collection of immortals. The Athenians must maintain their identities while leading their fellows to victory against the Spartan soldiers that live as demigods among mortals. After surviving the encounter, the Athenians lie low for over two-thousand years before meeting back in modern-day Greece to settle old debts.