The Last Trail (1921)

The successful operations of a lone bandit known as "The Night Hawk" terrorize a frontier town, and when a stranger arrives riding a fine horse, suspicions are aroused and he is mistaken for the criminal. Winifred, who is engaged to dam engineer William Kirk, shelters the stranger from the sheriff, but Kirk has him arrested. Kirk decides to steal the company payroll and dynamite the dam; he accomplishes these acts but is captured by the stranger, who is revealed to be a company agent detailed to investigate Kirk.