Zara Montalve, half Spanish and half America, returns to her native California in time to see her parents murdered for their hacienda and gold by Sheriff Jim Harding and his gang. Posing as Lola Belmont, an American visiting from Detroit, teams up with Joaquin Murietta, posing as Carlos Del Rio, to form a Robin-Hood type band that takes vengeance on the gang and restores stolen gold to its rightful owners, aided by militia leader Dan Hinsdale.

One of the passengers on a train to Tombstone decides to rob it of the $250,000 it is carrying.

Pier 23 was one of three hour-long mysteries produced by Lippert Productions for both TV and theatrical release. Each of the three films was evenly divided into two half-hour "episodes," and each starred Hugh Beaumont as San Francisco-based amateur sleuth Dennis O'Brien. In Pier 23, O'Brien first tackles the case of a wrestler who has died of a suspicious heart attack after refusing to lose a match. He then agrees to help a priest talk an escaped criminal into returning to prison.

A San Francisco private eye finds himself under suspicion while investigating a prizefighter's murder.