In the aftermath of the Saints' triumph over Hades, Seiya lies crippled and helpless in a wheelchair, his chances of recovery seemingly slim to none. Athena's sister, Artemis, the Virgin Goddess of the Moon, makes a tantalizing offer: restore Seiya's physical prowess in exchange for Sanctuary's dominance. Athena accepts, and Artemis and her "Knights of the Sky" swiftly seize control of their homeland.

Saint Seiya: Heaven Chapter - Overture
As the war subsides, Hades is vanquished and Seiya lies helpless, his injuries too grave to recover from. Saori discreetly nurses him, shielding him from the city's inquiring gazes. However, just as they think they've achieved tranquility, a menacing menace appears in the form of Artemi...