The Henderson family is on their way home from a hunting trip when they  hit an animal in the road.After they examine the body in the road they find its a "bigfoot", they think its dead so they decide to take it home figuring there could be some money in it. However its not dead, and not the ferocious monster they thought it would be. Turns out he is a friendly giant. The Henderson's try to keep Harry a secret, and have to hide him from the authorities and a man, who has made his goal in life, to catch a "bigfoot".