Eva, a sexology teacher, stays at Robertinho's farm to cure him of his sexual shyness. Successfully, she seduces him and his sister Naná, despite the uncompromising morality of their parents, who are from a traditional family in Minas Gerais. The father, after some resistance, reveals that his moralism comes from a childhood trauma when he caught his parents in a sexual relationship. Eva believes the father can benefit from her expertise and will try to cure him.
Juliano is a millionaire who leads a boring life amidst the facilities that money provides him. One day, he decides to change his routine and associates with a mad scientist, Professor Kunz, who invents a magic potion, a drug that releases the other side of the personality of those who consume it. Juliano becomes a guinea pig and tries the potion, transforming into the beautiful Juliana (Vera Fischer). However, the effects of the new drug will cause many confusions between the millionaire and the crazy professor, creating complicated situations for both of them.
