What would happen to the precarious balance of power if scientists could extend life for centuries? If one power bloc had biological protection against radiation and the other did not? Whose thumb would press the button first?

When Lyle Taney took leave from her teaching job to live high in the mountains, researching the ways of eagles, she was just planning to write her next book. Lasater was an unscrupulous, skilled operative who thought he could maneuver her as he pleased. He believed women were incapable of making ethical or moral decisions—and he was wrong. When the obscure government agent from an anonymous department tried to force Lyle to spy on her mysterious neighbors, she resisted. But the first step had been taken, involving her in a life-and-death struggle.