The story takes place in Ancient Greece, more precisely Sparta. The action does not follow chronological events. The story takes place around 490 BC. Shortly after the Battle of Marathon. Spartans lead a disciplined and restrictive life as well as military training. Orion, like other male Spartans, is dedicated to defending the country. They are athletic and undergo heavy training. Orion lives in the barracks with the other warriors,. From the age of 30 he can marry a woman.