Yancy Derringer returns to New Orleans to save his mansion from a carpetbagging Reconstruction overlord.

Charged with cleaning up the notorious Gallatin Street, Yancy Derringer finds himself once again at odds with Toby Cook, owner of the Jumping Jack Casino.

Yancy decides to assist a US Marshall in the river with the transportation of $200,000 in Army payroll greenbacks.

Yancy has 24 hours to save Administrator Colton from a deadly duel Spade Stuart, even though he is preoccupied by impressing Boston.

Madame Francine's cousin from Ireland visits New Orleans and decides she wants Yancy to be her future husband.

When City Administrator Colton hangs a member of an outlaw gang, the underworld of New Orleans plan their revenge.