Sherman Klump (Eddie Murphy) is a college chemistry professor who is known for his high intelligence and obesity.
Although self-conscious about his weight, he decides to ask out Carla (Jada pinkett smith), a workpartner.
Seeing that his appearance is not appropriate, he decides to try the invention he was working on at the university, a formula for losing weight. AND
The brew works and transforms into Buddy Love, an attractive and slim young man. But little by little the personality of an attractive and delusional Don Juan will take over him.