Hoping to bury her criminal past, Jenny Hadley settles into a comfortable existence as Gina, the wife of the politician Clinton Crane. When her former associate Floyd Durant shows up to blackmail Gina, she has no choice but to murder him. Things take a bizarre turn when Barbara Arnold is charged with Durant's murder and Gina is selected to serve on the jury.

A group of outlaws posing as Southern sympathizers and led secretly by freight-line owner Jim Maroon are raiding stagecoaches, and this is a threat to the Union communications. Grif Holbrook, a trouble-shooter for the Butterfield Stage Line, and Union man Barney Broderick team up to try and put a stop to the activity, when they aren't fighting over the charms of Kate Crocker.

When he unwittingly sends some of his men into a trap, pirate Captain Peter Blood decides to rescue them. They've been taken prisoner by the Spanish Marquis de Riconete who is now using them as slave labor harvesting pearls from the sea.