Earth was at bursting point, in spite of the birth restrictions of only one child to each couple. Extra children existed in a sub-cultured world or were rounded up into slavery. The only hope was the space platform -- the jumping-off point for the colonization of other worlds. But more Talents were needed to build and operate those platforms.
Rhyssa Owen was the one responsible, both for finding Talents and training them. And when she felt the first encroachment of a mind reaching out to her, she knew it was exceptional -- a fourteen-year-old boy with incredibly powerful kinetic ability. And in the seamy underworld of near-criminal children was another brilliant mind in danger from a ruthless group of child kidnappers.
Rhyssa knew she had to find the two children and train them for the survival of earth.
Anne McCaffrey, one of the queens of science fiction, knows exactly how to give her public what it wants.