Elsa is a spoiled girl, daughter of the owner of an auto parts factory. Luis is a mechanic who yearns to be able to undertake a project. By chance both will meet, but they won't have a good first impression of each other: when she, after treating him with disdain, owed him 50 pesos for his services and sends him with his father to pay him. When he has the opportunity to meet the entrepreneur, Luis gets his support to carry out a project for his car workshop, however, he'll face the company's engineer, who won't only seek to take away the intellectual property of his invention but is also Elsa's boyfriend. In the middle of the intrigues, the protagonist manages to enter the automotive Panamerican race, while Elsa learns the value of effort.