Overview
Lyonesse is a novel by Jack Vance published first in 1983.
Plot summary
The story has several related storylines which are not always precisely chronological.
Suldrun, daughter of King Casmir of Lyonesse, is a pensive girl who discovers and spends much time in a secluded old garden in the palace grounds as to avoid the more unpleasant obligations of a princess. When Casmir arranges her marriage to Duke Faude Carfilhiot, she resists, and her father confines her to the garden as punishment.
Princes Aillas and Trewan of Troicinet are sent on a sea voyage to visit the various kingdoms of the Elder Isles to gain experience with statecraft. While in port, Trewan learns that his father has died and that Aillas is the heir to the throne. Late at night, Trewan pushes Aillas overboard in an attempt to assassinate him. Aillas washes ashore on the shore of Suldrun's garden. While he recovers, they become lovers and plan to escape; Suldrun becomes pregnant. Aillas is discovered, imprisoned and imprisoned in an oubliette. He eventually escapes and finds that Suldrun has committed suicide. He resolves to go on a quest to find his son, Dhrun.
From Wikipedia (CC BY-SA 4.0).