The second book in the "Remember the Future" series. Katherine, Trevor and Chryseis embark on a ship and sail to remnants of the sunken continent of Atland. When a stolen speaking stone is found in their luggage, everybody suspects the three friends. Suddenly everybody is after the mysterious stone from the fabled land of Lyonesse and some of the strange sea creatures are not as amusing as they seem. Then the speaking stone has something to say...