Despite being warned by a cranky old garage owner to stay on the highway, know-it-all "Big Bob Carter" (Russ Grieve) decides to take his family on a dirt track so they can try to find an old silver mine. The road is barely designed for a donkey, much less a car towing a caravan and so into a ditch they go and their troubles begin. Initially, that is just the inconvenience but when one of their dogs heads off, chased by his son "Bobby" (Robert Houston - clad in the tiniest pair of shorts that still appeared perfectly adequate for modesty, though), we start to realise that there is danger all ar...