When Darrin starts searching for a "Miss Jasmine" for his firm's perfume account, Endora seizes the opportunity to sow doubt in Samantha's mind about her husband's loyalty. The search for a beautiful model ends when Jannine Fleur arrives. Both Larry and Darrin agree that Jannine is "Miss Jasmine." Samantha learns that Jannine is a witch whom Endora has asked to captivate Darrin. Samantha warns Jannine to keep away from Darrin. Jannine, intrigued, keeps on with her original assignment. Darrin uses Larry Tate as his chaperone to keep him from becoming involved with Jannine. Darrin and Larry go to Jannine's apartment to discuss details of the "Miss Jasmine" campaign. Jannine doctors the drinks. Larry falls asleep and Darrin becomes amorous. Just as Darrin starts to kiss Jannine, Samantha uses her witchcraft, and Darrin appears to Jannine as a large ugly fish. When the campaign is completed, Samantha turns the advertising picture of "Miss Jasmine" into a caricature of Jannine.