Gun for Revenge (2009)

While Gabriel Moonlight hides out in Mexico, Ellen Kincaide asks him to avenge the death of her sister and Gabriel's former girlfriend, Cally. He refuses, but when Ellen is kidnapped by bandits Gabriel sets out to rescue her. Then he has a change of heart and promises to kill the man who murdered Cally. But he discovers the identity of the murderer and knows that to exact retribution means almost certain death. Even so, a promise is a promise.