An awkward, telekinetic teenage girl's lonely life is dominated by relentless bullying at school and an oppressive religious fanatic mother at home. When her tormentors pull a humiliating prank at the senior prom, she unleashes a horrifying chaos on everyone, leaving nothing but destruction in her wake.

A docudrama depicting a hypothetical nuclear attack on Britain. After backing the film's development, the BBC refused to air it, publicly stating "the effect of the film has been judged by the BBC to be too horrifying for the medium of broadcasting." It debuted in theaters in 1966 and went on to great acclaim, but remained unseen on British television until 1985.