A young couple inherits a section of rural land backing up on the Navidad River. The land includes a ramshackle house. School teachers, they decide to devote their summer to making the house livable. Unbeknownst to them, a mysterious creature inhabits the Navidad bottomland. The young couple runs afoul of the creature and ugliness ensues.
Texas really does have a Navidad River, and there really are legends of a creature living in the bottomland. As for the rest, read the story and decide for yourself whether you want to camp near the river.