When Lulu and Elizabeth find themselves in Camelot, they are expecting to meet King Arthur and the Knights of the Round Table. Instead, the twins enter the world of the Lily Maidens, an organization of women who travel through legends and time in pursuit of knowledge.

But dark forces are uniting against the Kingdom; Merlin, the Black Pig, and a vast army of men and mythological beasts are marching for Camelot’s gate. Only the magic of science, mathematics, and poetry can preserve honor’s code and defend the Kingdom against the impending onslaught of evil.