When images of a lost civilisation are "dreamed" by a prophet, Nigel Sheldon is asked to investigate. The dreams seem to be coming from the Void - a mysterious area of living space with hugely destructive capabilities. Crash landing on an unknown planet within the void, Nigel finds far more than he expected. Bienvenido: a world populated by the descendants of survivors from Commonwealth colony ships. For centuries they have been fighting a desperate battle against the Fallers, a space-born predator artificially evolved to conquer worlds. Nigel soon realises that the Fallers hold the key to the destruction of the Void itself.