The Marx Brothers take on high society and the opera world to bring two lovers together. A sly business manager and two wacky friends of two opera singers help them achieve success while humiliating their stuffy and snobbish enemies.

The friendship between two orphans endures even though they grow up on opposite sides of the law and fall in love with the same woman.

At the breaking of the Civil War the garrison of Fort Laramie splits between the sympathezers of the two different factions, but when the fort is attacked by the Sioux, they unite their forces to fight them.

A husband-and-wife detective team takes on the search for a missing inventor and almost get killed for their efforts.