It is written in the Law of Annwn that whoever presents the Lost Treasure the torc of kingship to the Queen at Samhain will be crowned King. Having located the torc, it's up to Jack and his friends to keep it from the clutches of Velindur, who threatens to snatch it away and claim the kingship of Annwn, which Jack knows is rightfully his. Meanwhile, somebody is kidnapping fairies and other creatures from Newton Gill Forest. The Oak Lord can help protect the creatures on Earth, but who is he and why is he so important?