In March 1933, heavy roadworks disturbed the peace on the north shore of Loch Ness - Scotland's longest and deepest Loch. Shortly afterwards, two local residents saw an enormous black body move into the water and across the surface of the Loch. Since then, there have been many sightings of what appears to be a dinosaur like creature weighing in excess of five tons. With the help of computer graphics and virtual reality, this programme examines the sightings in detail and shows rare footage, taken by a Canadian couple in 1989 with a video camera, which has to be seen to be believed.