An adventure story of danger, fear and intrigue. Ten year old Jose and Sarah are to perform in a ballet, in which the famous Kerayaska is the prima ballerina. They hear Kerayaska has been kidnapped, so with their friend Penny, they determine to find and rescue her. In Jose's dinghy, they sail to a small island, called Bear's Island. They see two strangers whose overheard conversation convinces them they are the kidnappers and the dancer is on the Island. There follows a terrifying search through caves and rock walled tunnels as a fierce storm rages outside.