Sabrina discovers and later releases an overeager mystical genie named Djinn, who insists
on granting all of her wishes; including those of everyone in Greendale. However, once the wishes are granted they cannot be undone. At Witch School, Sabrina accidentally wishes that the building would be less hot, causing to freeze everything in a large dome of solid ice, leaving Veralupa , Ambrose and Professor Giest trapped inside. The three of them try to climb the frozen mountains to get out of Witch School, while Sabrina deals with Djinn.
As Sabrina gets more and more annoyed with Dijin suddenly granting everyone's wishes, which causes utter chaos all over Greendale, she wishes that she had never found the mystic lamp in the first place. This resets everything to the beginning of the episode with no memory of what had transpired. Sabrina nearly finds the lamp again, but passes by it, therefore leaving Djinn trapped inside forever.
- The title is a parody of the saying "Careful what you wish for, it might come true."
- Some say that wishes will go wrong and backfire on the wisher.
- Some genies may grant three wishes at a time.
- Enchantra did not appear, as she was on a cruise to the rivers of blood. Her son, Shinji , also did not appear.