|summary=Who is the real enemy? This is the question which confronts Sam, the champion of the Sereia in their cosmos-spanning war with the Gibbus, and the main character in this story. Sam is an unimposing boy who has no past and no memory of who he is, yet he possesses extraordinary abilities. He is also Earth's last hope for salvation from the Gibbus who, in seven days, will destroy the planet and everyone on it. This is not his choice however: that is the decision of the alien Sereia, his mentors and guides, as he is forced to confront this hazardous task. They have their own reasons for wanting Earth to be saved, but are too weak to challenge the Gibbus themselves. In their search for a human champion they find the unlikely and ill-prepared young boy, Sam – but this child is not quite as he appears…