While still at university, the talented mathematician John Nash demonstrated both his gift and his curse—pathological antisociality, which gradually developed into schizophrenia. After getting married and starting to teach, he was not at all surprised when government agent Parcher asked him to secretly decode the secret correspondence of Soviet spies. Completely absorbed in this work, Nash only realized a few years later that not all of his acquaintances and colleagues actually existed. Some of them turned out to be figments of his diseased mind…