It's a mystery as old as time. Does a monster lurk beneath the dark depths of the Loch Ness waters? American zoologist Dr. Jonathan Dempsey (Ted Danson) is determined to find out. Danson leads an international cast in this great family adventure. Dempsey begins his search with the help of his landlady (Joely Richardson) and her daughter Isabel. Ian Holm plays the mysterious old water bailiff working against Dr. Dempsey as he searches to find the truth in the legend of the Loch Ness monster.