Medieval Britain: King Arthur is on the throne supported by his Knights of the Round Table. These are times of bloody wars, of invasion and killing, and the pursuit of glory on the battlefield.

Peaceful interludes allow for other endeavours and many will go in search of the Holy Grail. When Guinevere is offered a pivotal role in the 'glorious quest', she does not hesitate to embark upon an adventure she has been waiting for all her life.

But in Camelot she learns about seduction and betrayal and, though befriended by King Arthur and welcomed at court, she finds she is not adept at the games played there. Then she discovers that even her close companions, Blanchefleur and Iseult, have their secrets....

Will Guinevere be able to protect those closest to her when they need her most? Can she win her father's approval without losing the trust of the king? Is the price of the Grail, even with its promise for the future of Britain, too high to pay?

As Guinevere proceeds with the enthusiasm and naivety of youth, the consequences of her choices become apparent and she discovers a darker side to chivalry which pushes her towards the ultimate sacrifice.