Uncle Arthur is in love. The object of his affections, a witch named Aretha, is beautiful but is a diva, she who does not know about Uncle Arthur's practical jokery, which she would not tolerate if she knew. When some of Uncle Arthur's practical joking comes to the surface, he is uncertain if he will be able to suppress this natural aspect of his being. In the name of love, he decides to rid his practical joking by transferring it to Samantha and Darrin's house. Samantha and Darrin in turn are bombarded by one practical joke after another by the house. Samantha is powerless to stop it as Uncle Arthur is the only one who can remove the spell. This may cause problems for Darrin as he invites a client and his wife over to the house.
—Huggo