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.

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.

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.

After a four year absence, detective Nick Charles returns to New York with his wife Nora and their dog Asta. He’s approached by a woman whose inventor father is suspected of murdering her step-mother. Nick isn’t all that keen on resuming his former profession but is egged-on and assisted by Nora.