When young Matthew starts talking to himself, and introduces his invisible friend, Chocky, to the family, his parents decide it's just a phase he is going through. But when Matthew starts explaining binary maths and anti-gravity propulsion, they begin to worry. Is Chocky really just the product of an over-inactive imagination, or something...
It was meant to be a harmless stag night prank. A few hours later four of his best friends are dead and Michael Harrison has disappeared. With only three days to the wedding, Detective Superintendent Grace - a man haunted by the shadow of his own missing wife - is contacted by Michael's beautiful, distraught fiancée, Ashley Harper. Grace discovers that the one man who ought to know Michael Harrison's whereabouts...