Rafi is fourteen years old, on the verge of legal adulthood as a Homesteader on Cygnus B, and a student at the Lyceum, a school for the psionically gifted. Unfortunately, on Cygnus, psionic powers are mostly feared, and the Lyceum is as much about keeping the students from becoming dangerous as it is about teaching them to use their powers well. Rafi, with powers that will enable him to help people or to control them, is not being helped by the school's treatment of him; instead, he's having nightmares and feeling less and less secure.
Fellow students Ntenman and Serendipity are communities that do support psi powers, and are a little more protected, but have their own reasons for wanting to leave.
So Rafi does, using his powers to help him slip out, and heads first to his mother's home, and then to his aunt's. Serendipity and Ntenman soon follow. It's not long before all three are off Cygnus, on another world, faced with new challenges and about to experience violent political change.