Professor Luciano Lima arrives in the fictional town of Nova Esperança to take over as principal of a school. A widower, he hires a governess to take care of his four children: Júnior, Babi, Zizi, and Rui. The professor and the governess, Paula, fall in love, but the romance faces strong resistance from the children, especially Babi, the most rebellious of the four. Luciano also encounters difficulties at the school. His former girlfriend, English teacher Maria do Carmo, does everything she can to steal his position as principal. Meanwhile, a group of maladjusted and rebellious students, led by the biker Rafa, disrupts the school environment and bothers the other students. In this scenario, Giovana, a young psychologist hired by Luciano to help him deal with the rebellious students, emerges. She ends up forming a love triangle with Paula and the professor.

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