The great sorcerer Merlin has returned to Camelot, a kingdom now vulnerable to ill fates and war since the theft of the Holy Grail, its greatest gift and protection. With the help of Jack, an irascible young beggar-thief imbued with his own unruly magic, the fight against unknown dangers begins-to find the Grail, restore it to its rightful place, and bring Camelot back to its glory days.