By night, Mr. Browning (Walter Miller), a man of wealth, masquerades as Red Harrigan, a common frequenter of saloons. He soon becomes the notorious leader of an underworld gang in Detroit. After Browning experiences a series of escapes from the police and a famous detective, involving car chases and a dive into the Detroit River, the detective learns that "Harrigan" is really his own brother, and that the reason he began living a double life was to find and reclaim his sibling.