The wicked wizard Abanazar, in his desert home in Morocco, summons the spirits to tell him how he may obtain the magic lamp — source of all power. He is somewhat bemused to discover that the source lies in a Chinese Laundry in Peking, and the launderess' ne'er-do-well son Aladdin. The ghostly chorus of the spirits takes us into the next scene, where Aladdin himself is discussing with his mother the virtues of idleness.
The emperor's herald proclaims that anyone looking upon the Princess Badroulbadour as she passes on her way to the baths will be instantly executed. This is just the kind of challenge that Aladdin likes, so he rushes off to try to catch a glimpse of the Princess. When he returns from his quest the Widow is relieved that he is alive, but very concerned that the young couple are in love. Everyone, including the emperor himself, has a pretty shrewd idea of what has happened — but, as he explains in song to his daughter, "Loves's a luxury" that royals must forgo for reasons of state.
Abanazar's arrival seems like just the thing. He quickly convinces the widow and her son that he is the boy's long lost uncle and that he will make Aladdin rich. The upshot of this finds Aladdin trapped in the cave — where he inadvertently summons the genie of the ring — a sympathetic young lady who readily agrees to take him to his mother's house, after a few tears over the sad fact that "Genies have no mothers". The Widow Twankey starts to clean the rusty old lamp which is all her son has brought home — thus summoning another, much more powerful genie who makes it clear he will do anything for anyone unless they make unkind remarks about his green colouring. In no time at all Aladdin is a prince, and happily married to the princess of his dreams.
The Widow Twankey is now the Royal Mother-in-law — and manages to dispose of that rusty old lamp to Abanazar. He is now the Genie's new master — and he quickly takes the palace to Morocco. Under sentence of death from the emperor, Aladdin follows the palace to Morocco with the aid of the genie of the ring, and, obtaining the lamp, he gets the palace and the princess back to their wonted places. Abanazar however follows Aladdin back to China, where it becomes apparent that in a contest of brains our hero hasn't a chance. What is he to do? A bit of old fashioned violence is called for. This remedy applied, Abanazar is carried off by the Great Roc and all ends happily.