Three cousins inherit pieces of map describing the location of their uncle's buried treasure. Not trusting each other, they hire Bat to guide them to the place where the money has been hidden - a place known as "Worry Hill".

A casino owner hires a marksman with money problems to kill Bat to whom he is deeply in debt. When the man's pregnant wife convinces him to renege on the agreement, the casino owner hires two hard cases to force the confrontation.

Two gunmen steal the horses from the stagecoach in which Bat and Lorna Adams are riding. Bat trades his cane for a horse so Lorna can get to Austin to present evidence that will save a man from the gallows but the thieves have other ideas.

An old friend asks Bat to San Francisco to look into the background of her daughter's fiancée which is a cousin. Bat learns she is a frequent visitor at a casino where she seems to win but her fiancée seems to lose - even his life.

Bat's stake is stolen to force him to work for a crooked casino owner. When he refuses, events lead Bat to come to the aid of two beautiful women who are being blackmailed by the owner of Sacramento's largest casino, "The Lady Luck".

When Hugh Blaine bets $50,000 that all four hooves of a racehorse are off the ground at once, he agrees to pay Bat 10% of the bet to supply proof. Bat hires a man to take photographs of the trotter in action, but the pictures are stolen.