Ali Baba and his elder brother Cassim are the sons of a merchant. After the death of their father, the greedy Cassim marries a wealthy woman and becomes well-to-do, building on their father's business. Ali Baba marries a poor woman and settles into the trade of a woodcutter. One day, Ali Baba is at work collecting and cutting firewood in the forest, and he happens to overhear a group of forty thieves visiting their treasure store. The treasure is in a cave, the mouth of which is sealed by magic. It opens on the words "open sesame", and seals itself on the words "close sesame". When the thieves are gone, Ali Baba enters the cave himself, and discreetly takes a single bag of gold coins home.

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