Sir Richard of Taunton is attacked and beaten by three men and left for dead. His uncle plans to substitute his son, Richard's double, and gain control of the family estate. Lancelot is suspicious and starts investigating.

While on a visit to castle Lamorack, Sir Lancelot and Merlin try to help their host when he receives a note threatening his daughter's life. Merlin learns that the note is false, and written by the girl herself in a bid for attention. Later the girl disappears. Another notes arrives and this time it's genuine.

When a king breaks a treaty between his country and a tribe of women, his sister is taken hostage. Sir Lancelot sets forth to rescue the princess.