Banished by Uther Pendragon to the convent of Tintagel after she tried to kill her half-brother, Morgan is kept in strict confinement on the island , on pain of death never to leave. Three women battle for influence over Morgan: the abbess Bryvyth, determined to claim the girl’s soul for Christ; her former nurse, Gwennol, and Luned, the young nun instructed to look after her.