Based on truestory. In 1945 a mental hospital receives a patient who will be known to all as Princess. The patient is fortunate because the staff at hospital will attempt to cure the patients relying on various new methods, that aren't too schoolbook-like. In this somewhat 'liberal' environment Princess will become known to all as some kind of Her Royal Highness who can, maybe surprisingly too, treat everyone as if she really possessed the grace and power of a sovereign. But of course the reality will always strike back, softer or harder.