Sir Galahad, the one destined to achieve the Holy Grail, fails. Why? The story of the best knight in the world, his trials, shortcomings, and why he called himself 'Il Chevalier Mesfais,' the Knight who Sinned.

Waking up in an enchanted castle with a beautiful maiden by his side, Daemon has no memories except for a sword in hand. Will he be able to break the curse that traps them both?

Lord Adrian von Gryff, the closest confidant of the Crown Prince, has it all: looks, wealth, fame, power. Or does he? But when fate hands him the role of the stepsister in what looks like a production of Cinderella, what's a proper gentleman to do? Step up and get the task done, of course!