Summary

A young girl disappears, presumed drowned on the Cornish coast while on holiday. Meanwhile, the British Minister for Defence is coming to the same area to stay. His children, the 3 Js, make some startling discoveries while birds are behaving in a sinister way.

Global Threats

The nation's security lies on a knife-edge: a comet is on course to collide with Earth, and there are anonymous threats of terrorism.

The Adventure

The minister and his wife return to London, while James, Jo, and Jake ride to Lyonesse, where they meet knights of the legendary Round Table. Their perilous mission takes them to the Lady of the Lake, and they must awaken King Arthur himself.

Villains and Challenges

In their way stands the evil Morgana Le Fay, who is supported by the hideous morogwyths and mythical creatures of the underworld.

Climax

The fate of the missing girl is revealed, and Avalon witnesses its most terrifying battle in the air and on land, a battle that will decide the destiny of the world as we know it.