Psychology recognises the existence of multiple personalities inhabiting the same mind. To the ancients such strange transformations were evidence of demonic possession, and even today there are reputable experts who would not rule out the possibility that something else can take over a human mind. To the victim of such personality change there are long periods for which the memory cannot account, periods during which the secret enemy is in charge. Walter Hamilton was a perfectly normal, well-adjusted man in early middle age when strange gaps in his memory first began to worry him. At first he tried to ignore the tell-tale symptoms of schizophrenia but other clues presented themselves. The face in the crowd scene on a telerecorded film vaguely familiar. It wasn't his fave... but there were undeniable similarities. A picture in a newspaper worried him more... Before he could extricate himself he was trapped in a tangled web of interwoven personalities, unable to find himself, powerless to break away from the sinister complications of his two other lives.