The tale of Zetes and Calais, known collectively as the Boreads, begins in the high, frost-laden peaks of the north, where their father Boreas, the personification of the North Wind, held his wintry court. Boreas was a deity of immense and unpredictable power, capable of freezing the world with a single breath or flattening forests with his sighs. He had taken the mortal princess Oreithyia as his wife, and from their union came children who straddled the boundary between the human and the divine. Among them were Zetes and Calais, twins who appeared as handsome men but possessed a remarkable secret: upon reaching maturity, golden-hued wings sprouted from their shoulders or, as some storytellers of the ancient world claimed, from their heels. These wings were not merely decorative; they were the engines of the wind itself, allowing the brothers to dart through the firmament with the speed of a storm front. They were invited to join Jason and the greatest heroes of Greece aboard the Argo, a ship destined for Colchis in search of the Golden Fleece.
As the Argo carved its way through the waves, it eventually reached the shores of Salmydessus in Thrace. There, the heroes encountered a sight that dampened their spirits and moved their hearts to pity. Phineus, the king of the region, was a man who had once possessed the gift of prophecy, but his clarity of vision had come at a terrible price. Having revealed too much of the gods' secret designs to mankind, or perhaps having offended Helios or Zeus with his hubris, he had been struck blind. Yet, his blindness was not his greatest suffering. The gods had sent the Harpies—Aello and Ocypete, sometimes called the 'Hounds of Zeus'—to torment him. These creatures were described as having the bodies of giant birds of prey, with sharp, curved talons and the faces of pale, withered hags. Whenever the starving Phineus attempted to sit for a meal, the Harpies would plummet from the heavens with a deafening screech. They would snatch the food from his very hands or, more cruelly, they would defecate upon the table, leaving behind a stench so foul and putrid that no mortal could bear to remain in its presence, let alone eat what remained.
Phineus, skeletal and trembling, recognized the arrival of the Argonauts through his prophetic senses. He begged Jason and his crew for salvation, promising that if they freed him from this curse, he would reveal the safe passage through the Symplegades, the Clashing Rocks that guarded the entrance to the Black Sea. Jason, moved by the king’s plight, turned to the Boreads. Zetes and Calais stepped forward, their wings twitching with the anticipation of the hunt. They understood that only those with the power of the wind could hope to catch the swift-winged daughters of Thaumas. To set the trap, the Argonauts prepared a magnificent feast of roasted meats and sweet wines, laying it out before the blind king. The aroma drifted into the sky, acting as a lure. In moments, the air was filled with the rhythmic beating of heavy wings. The Harpies descended like a black squall, their talons extended and their shrill cries piercing the air. Before the Argonauts could even draw their swords, the monsters had despoiled the feast and were banking back toward the clouds.
But the Boreads were already in motion. With a sudden burst of speed that rattled the Argo's masts, Zetes and Calais took flight. They were no longer mere men; they were the North Wind personified, streaks of gold and purple cutting through the azure sky. The Harpies, surprised by the presence of hunters who could match their velocity, fled southward. The chase was grueling and spanned hundreds of miles. They flew over the rolling hills of the Peloponnese and across the white-capped waves of the Aegean, eventually moving westward toward the Ionian Sea. The Boreads drew their swords, the blades catching the sunlight as they slowly gained ground on the monsters. The Harpies, exhausted by the relentless pursuit, dipped lower and lower toward the surface of the water, searching for sanctuary. They reached a small cluster of islands, then known as the Plotai, or 'Floating Islands.'
Just as Zetes and Calais were about to strike down the creatures with their celestial steel, the sky shimmered with a prismatic light. Iris, the goddess of the rainbow and the sister of the Harpies, descended from the heavens. She moved with a grace that silenced the wind. She commanded the Boreads to stay their hands, for the Harpies were the servants of Zeus and it was not the will of the Fates that they should perish by the swords of men. Iris offered a divine compromise: if the sons of Boreas spared her sisters, she would swear an unbreakable oath by the River Styx that the Harpies would never again trouble Phineus of Thrace. They would retreat to a cavern in Crete, far from the dwellings of men. Zetes and Calais, respecting the messenger of the gods, sheathed their weapons. At that moment, the islands were renamed the Strophades, or the 'Islands of Turning,' marking the exact spot where the winged brothers turned back from their pursuit.