This is a sequel to the Magic Aegis world and a prequel to Acceptance.
Tyna is Kissre's sister. Where Acceptance gave Kissre's story, Change is Tyna's. After her mother's death Tyna, who has always been warned not to expose her special mental gifts, finds the temptation to take her trader's caravan into Cygna irresistible. Once there she finds she won't be permitted to leave.