As the police force get wind that the "syndicate" is after a witness, they turn to investigator Chase in thoroughgoing terror. He figures out a scheme to pull the police out of a nasty pickle.

A risky burglary is executed in order to save a man's reputation. Chase helps the man to retrieve some compromising letters hidden in a vault.

The story has to do with an investigator turned boxer to get information on fight racketeers.