Thera, daughter of Ares, God of War, is being used as his pawn to start a war between the Trozens and the Centaur race.When Kyros, second son of the deceased king, jumps in front of Ares' beam, he unknowingly volunteers to father Thera's child. Ares' plan is to impregnate her with the seed of a centaur and send her to marry Kyros' evil brother, Pittheus, to start a war between the races.Thera is thrilled her father's plan is ruined, but Kyros does not share in her happiness. Cursed by Ares, Kyros is man by day and centaur by night. He keeps his secret from Thera, knowing how much she hates centaurs, and not even sure of the race of the unborn baby. His heroic act brings them together, but his dark secret threatens to tear them apart.