A mysterious drifter, Paul, and his loyal dog, Abbie, cross the harsh desert landscape in the late 1890s, aiming to shorten their journey to Mexico through the sparse, seemingly quiet town of Denton, often referred to as the "Valley of Violence". Denton, however, is far from the peaceful refuge Paul hopes for; it's a town gripped by fear, governed by a group of roughnecks led by the marshal's son, Gilly. After a seemingly minor altercation escalates, Paul's attempt to leave his violent past behind is shattered, ensnaring him in a cycle of vengeance that promises bloodshed.

Caught up in the conflict, Paul finds unexpected allies in Mary-Anne and Ellen, two sisters who run the town's inn and see in Paul a chance for redemption - or at least some form of justice against the town's bullies. As tensions boil, the town's marshal, an aging lawman with a complex sense of honor, is caught between his duty to protect Denton's troubled peace and his loyalty to his son and his gang. Paul's presence exposes the fragile lines between justice and revenge, challenging both the townsfolk and the drifter to confront their pasts and their morals in a struggle that can only end in violence.