Mark and his friend Lorrie are out riding and plan on passing through Old Tony's property. Old Tony is something of a hermit who generally doesn't like people on his property. In fact, just as Mark and Lorrie arrive he's feuding with someone. Tony takes a liking to the young people, however, and gives them a meal. He also lets them search for old arrowheads on his land. When Mark fails to return home Lucas becomes concerned particularly when he learns they may have gone onto a swampy area with quicksand.
—garykmcd