The moment Seo, time-traveler from the future, hears about Excalibur, she knows she needs to steal it. But when Seo realizes what Excalibur really is, she begins to understand that King Arthur's story is wrapped up in her own. With a threat spreading, threatening Arthur and his warriors, Seo must face her past and childhood fears, to save all of history... from Arthur, to now.

"Spawn of the Ancients, boy! The undead. The bloodthirsty. They travel through time like smoke through air! And we've gotta grind them under our heel before they can strike!" When Jim finds himself kidnapped and dragged through time as part of a diabolical plan to destroy history, he must team up with Seo, a temporal agent, to stop it. But what about the vampires?