A tough gunslinger revisits his home town to find it overrun by a criminal gang, which includes his half brothers. He's enraged by their exploitation of the plague-ridden locals - so joins forces with an old ally in an effort to restore law and order. Spaghetti Western with a musical element, starring a singing Franco Nero, Woody Strode, William Bergen and Olga Karlatos.

Half-breed Keoma returns to his border hometown after service in the Civil War and finds it under the control of Caldwell, an ex-Confederate raider, and his vicious gang of thugs. To make matters worse, Keoma's three half-brothers have joined forces with Caldwell, and make it painfully clear that his return is an unwelcome one. Determined to break Caldwell and his brothers' grip on the town, Keoma partners with his father's former ranch hand to exact violent revenge.