SUPREMELY PREPOSTEROUS supernatural kids twaddle concerning an ancient mystical force which could bring modern life to a standstill. As was typical in the 70s, those at the centre of the mayhem were a bunch of Unlikable Posh Children. Begins with whole country suffering a power cut (topical) and population decamping to France. One of the posh kids gets separated from her family and falls in with some Sikhs (topical). Lots of sci-fi quackery ensues including bollocks involving a stone called the Necromancer, Merlin and some hippies. Everything back to normal at the end, of course.