Melling[1] about two teenage cousins, one Irish, the other Canadian, that set out to find a magic doorway to the Faraway Country, where humans must bow to the little people.

Now sixteen, they travel to Tara, without telling their parents, the ancient seat of the High Kings in Ireland in search of adventure.

Therefore, since he is bound by an ancient law, the King only takes Findabhair, leaving Gwen to wake up wondering about her cousin's safety.

When she finally catches up with the faeries fast pace, she learns that she or her cousin must be the sacrifice to an evil ancient creature known as Crom Cruac, the Great Worm, supposedly the serpent from the Garden of Eden.

Her cousin voluntarily chooses to be the sacrifice, upsetting Gwen and the King of Faeries, who has fallen in love with her.

In the end, with the help of many friends, Findabhair decides not to be sacrificed, but to be the first person to fight the serpent.