As captain of his own starship Estel, Terry Steward, born Terry Radnor, is committed to spreading acceptance of psi powers and other advanced mind capabilities throughout the colonies of humankind. Barred from contact with his beloved planet Maclairn, he now journeys from world to world, heralding the hopeful future about which he alone knows the full truth. But the opponents of mind-powers are gaining strength, and on Earth the persecution of people...