Simon, Lucy and Harry are on the run from Stanich and Professor Sharpe. Confused about Chrissie's disappearance, they know that they cannot trust anyone, and need to get to Astrid Island. When they are discovered by Stanich the group are packed off in an ambulance to be sent to the airport and deported.

The remaining three of the Falkirk group are questioned, but where is Lucy? Simon explores the camp and discovers her in the sick bay. Lucy and Simon are apprehended by the stewards but escape and after eventually discovering the secret purpose of ASTRID Island, they stumble upon a chilling new sighting.