Eleven year old Simeon Isherwood is locked inside himself - can neither walk nor talk. When he undergoes a radical new gene therapy, it seems as though he can finally make contact with the world. But Simeon, used to the tranquility of his inner world, finds himself in agony, the anxiety of new sensations and experiences catching the attention of a mysterious entity - a being god-like and aloof from humanity, which to heal the pain of a young mind it sees as its offspring.

When it does, the results are catastrophic.