 Suddenly an irresistible force, which can take the form of a giant hand, forces the Enterprise to the planet of a single person of human appearance, who welcomes the landing party throning in a Greek temple as Apollo and orders them to enter his cult and service, and selects Classicist Lieutenant Carolyn Palamas as his mate. The crew now believes him to be one of the aliens the Greeks took for gods, but in order to escape, figures out his power only comes trough a strange organ to his body, and renders him vulnerable when he uses it in rage...