A newly reunited young couple's drive through the Pacific Northwest turns into a nightmare as they are forced to face nature, unsavory locals, and a monstrous creature, known to the Native Americans as Oh-Mah.

Charley Thompson is a homeless 15-year-old in Portland, and Lean on Pete is his best friend and a failing racehorse. They set off an a journey to find his only known relative.

A young Mohawk woman and her two lovers battle a squad of American soldiers hell-bent on revenge.