One sunny day, a necromancer attacks the royal palace in Ragh-Zahid, killing the King and many others as he kidnaps the two royal children. Vashkie Naldo's older sister Caffara dies trying to protect the children, so Naldo swears to fulfill her duty to protect the children by bringing them home. Going in disguise as a squire to a knight, she and Sir Buckshawe go out in search of allies to help them find and defeat the necromancer. They encounter a Faerie knight-errant named Devere and two amazon sailors from Fernare Araldo - Edmunda and Zenda. They get help from the wizards on Shadow Mountain and from Devere's love Viola, a Faerie sorceress.
Their mission takes them to the forbidden Castle of Necessary Evil, where the necromancer had holed up with his captives, a place the children Prince Saqr and Princess Zara explore - and find new friends to protect them. In the Castle of Necessary Evil, the rescuers face destiny and an entity of pure malice and evil.