Desafío is a reality show in which a number of participants should survive, live together, and compete in 4 different stages, for a big price in money. These contestants are grouped into three teams according to the theme chosen in each season. Social classes, generations, regions of the country and the degree of popularity are the elements used to give identity to these groups. Another one of the characteristics of the Challenge and which encloses the success of this format is that the conditions of life in this competition are not fair. While a group spends its day in a beach house with servants, exquisite delicacies (High Beach), the other group suffers the complete lack of accommodation and food (Low Beach). In this reality, as in real life, the teams would be able to exceed or fall on their comfort levels, depending on the performance in the territorial Challenges.

Catching the eye of a wealthy gentleman, spunky Ha-won gets hired to live with his three immature grandsons so she can whip them into shape.