Under the ice of Antarctica, Chooker is determined that the people of Atlantis must meet the Giants Outside; even though most of the rest of her family and the city rulers disagree. As she sets off in a dangerous quest to find the Giants, with her cousin Mungith racing to stop her, she is in danger from him, from the Giants, and worst of all from Hemminal, the vicious sister of the King. She plans to break the walls, risking flooding the whole city with lava, and is ready to do murder to succeed. It's up to a young Giant, Peter, to fight to save himself, Chooker and Mungith, despite his broken hand. Can he win his battle to the death? Has he the courage, the skill - and the determination?