In her cab, Elaine picks up a woman who turns out to be her old high-school rival, Mary. Elaine is embarrassed that she is a cab driver, especially since Mary heads a prestigious ad agency. To save face, Elaine makes up a story about having a wonderful boyfriend who is a Columbia University professor.
Over the next few days, Mary calls Elaine to try to arrange a dinner with their respective boyfriends. However, Elaine keeps making excuses, as she is ashamed that she made up a lie about having a boyfriend. When Elaine is about ready to confess her lie to Mary over the phone, Alex grabs the phone, pretending to be Elaine's boyfriend, and accepts her dinner invitation for that evening.
At dinner, Alex is so charming, so intent to make their relationship look very loving, that Mary and her boyfriend become jealous that they don't have such an exciting relationship. Meanwhile, even Elaine is swept up in the moment, and is taken by Alex's romantic acting job.
Having duped her friends, Elaine later asks Alex if maybe he wasn't just acting, but Alex denies that is the case. Alex attempts to prove it by kissing Elaine goodnight and saying he didn't feel any sparks, but she responds with a romantic kiss that leaves him dazed as she enters her apartment alone.