Newly engaged couple Brad Majors and Janet Weiss find themselves stranded during a torrential rainstorm after their car breaks down near a remote castle. Seeking a telephone, they stumble into a bizarre convention of "transylvanians" celebrating an annual gathering. Their hosts are the eccentric Dr. Frank-N-Furter, a self-proclaimed "sweet transvestite from Transsexual, Transylvania," and his motley crew of servants, Riff Raff and Magenta.Frank-N-Furter is a mad scientist engaged in a provocative experiment: the creation of a perfect, muscular man named Rocky Horror, designed solely for his own carnal pleasure. As the night progresses, the naive Brad and Janet are seduced by Frank-N-Furter, stripping away their conservative inhibitions and plunging them into a world of hedonism, betrayal, and
science fiction chaos. The atmosphere becomes increasingly tense as the arrival of Eddie—a rebellious, motorcycle-riding former lover of Frank—leads to a violent confrontation, resulting in Eddie’s gruesome demise at the hands of the doctor.The plot spirals further into absurdity as the castle’s inhabitants grapple with shifting loyalties. Rocky, initially confused by his own existence, seeks comfort from Janet, while Brad remains trapped in a web of sexual manipulation. Tensions reach a breaking point when Dr. Everett V. Scott, a rival scientist and former teacher of Brad and Janet, arrives searching for his missing nephew, Eddie. Frank-N-Furter suspects a conspiracy to dismantle his work, leading to a dramatic standoff.The climax arrives when Frank-N-Furter forces his guests into an elaborate, stage-managed musical performance. However, his control fractures when Riff Raff and Magenta reveal their true intentions: they are
extraterrestrial agents sent to terminate Frank’s mission. Tired of the decadence and the doctor's erratic behavior, the siblings seize command. In a final, explosive act of cosmic retribution, Riff Raff kills Frank-N-Furter and Rocky, dismantling the laboratory. The castle lifts off from the earth, returning to the stars. Brad, Janet, and Dr. Scott are left behind in the mud, forever scarred and liberated by the night's debauchery. They are transformed, having shed their former identities in the wake of the most surreal and scandalous encounter of their lives.