Ti'ana raises Gehn until he runs away as a teenager, learning the D'ni Art of writing descriptive books. Ti'ana also cares for Gehn's son, Atrus, until Gehn arrives to teach Atrus the Art. Atrus realizes that his father is reckless and power-hungry, and with the help of Ti'ana and a young woman, Catherine, Atrus traps Gehn on his Age of Riven with no linking books.