... is a scientist on a classified project, Dr. Haklos, following his exposure to certain chemicals which have made him the victim of hallucinations- and his collaborator, Dick Stoddard, is also close to the breaking point and persuaded that his visitation from Dr. Haklos is a delusion. But the attack against Stoddard's life which follows seems very real- and with a girl who now shares his belief in his sanity he undertakes the search for Haklos which ends in a frantic cross-country chase. A first, this paraphrases a familiar plot (leakage from a security installation) but keeps it tense and urgent.