 When the USS Enterprise delivers medicines to a high security asylum for the criminally insane of various galactic races, a former starship commander inmate, who how calls himself Lord Garth, heads a successful takeover with other patients, who become his humble subjects while the cruel madman seizes captain Kirk and Mister Spock, who now must fight the tyrannical self-declared Master of the Universe, whose megalomania includes staging his coronation with a human sacrifice...