High in the mountains, heavy black clouds gathered and then suddenly emptied upon the rocks and crags below. Day after day while thunder rolled and lightning flashed above desolate canyons, the storms continued. Dry gulches filled with water, creeks became rivers, and the rivers became torrents that roared towards the level plains below. Just east of the mountains, was the little town of Riverside, rested within a bend of Red River, and there had been no rain. The skies were clear, and nobody had an inkling that there had even been rain in the mountains nearby - except for one horseman who raced to warn others that the dam in the hills above was close to bursting...