What would entice a dedicated and dependable family man to abandon a promising career to go and hunt for a mythical beast? Aeronautical engineer Tim Dinsdale did exactly that and is widely credited with igniting the world’s fascination with the phenomenon known as the Loch Ness monster. Adventure was not unknown to Tim. He spent his early childhood in Imperial China, survived being kidnapped by pirates, and trained in South Africa for the RAF during World War Two. Then, in the late 1950s he stumbled across an article about an elusive beast living in the murky waters of Loch Ness in northern Scotland, and his innate curiosity was sparked. Characteristic of a true engineer, he carefully analysed over 100 sighting reports before organising his first visit to the loch. What he found there changed his life forever; Tim filmed a large, animate object swimming in the waters of Loch Ness. Over the following twenty-seven years Tim undertook fifty-seven Nessie hunting expeditions, along the way meeting a cast of colourful characters. His work with many serious explores and scientists yielded some exciting results, which culminated in a scientific symposium at the House of Commons in London, its purpose to gain acceptance of Nessie as a living entity and therefore be given a level of protection. Ultimately the attempt failed. Tim’s dedication to unravelling the Loch Ness riddle is captivating, his reasoning for finding the truth for truth’s sake compelling. His life ended before he was able to solve the mystery that held him in its thrall, but his film continues to intrigue monster seekers and researchers around the world.