Samantha asks Endora to stop bickering with Darrin and do something nice for him. When Darrin shows interest in an automobile of the future, Endora produces one for him. At their workshop, the designers find the model they have been working on has disappeared. Darrin tells Samantha he can't accept a product of witchcraft, but convinced that Endora's feelings will be hurt, he keeps the car and falls in love with it. At the office, Larry is in conference with Mr. Sheldrake, a meat packer. Darrin phones Larry to come over and see his new car. Grateful, Darrin is very nice to Endora until he finds that the car he thought Endora got through magic, was made in Detroit. Angry, when Darrin tells Samantha her mother gave him a stolen car, Endora leaves town.
Darrin sees problems ahead when Sheldrake arrives with Larry and decides the car would be a perfect symbol for his product. While Samantha tries to get Endora to return, Sheldrake takes the car for a drive around the block. When Endora returns, Darrin begs her to send the car back to its rightful owners. She does so, with Sheldrake still in it. Sheldrake and the car are whisked to the designers' workshop. Later, Sheldrake reports that the designers of the car have granted him permission to feature it in his advertising campaign.