Matter-transmitter sabotage leaves a British scientist (Bryant Halliday) disfigured and full of amps.

What secret lay behind the dreaded Marsh Phantoms, the ghostly riders whose silent approach in the darkness of the bleak, unwelcoming Romney Marshes causes men to die of fright? Are they a genuine manifestation or a cover for illegal smuggling activities. Perhaps Dr Blyss, the benign vicar of the quiet village of Dymchurch, knows the truth about the ruthless pirate and smuggler who lies buried in the village graveyard and can unravel the phenomenon of the curse of Captain Clegg.

Hugo is a brilliant turn-of-the-century scientist, loved and respected by his family and friends, admired by his colleagues. But he is a man quickly becoming obsessed with a curious and frightening question… what is the mysterious apparition found in the photographs of his dying subjects?