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.

Inspector Tai On-na (Jessica Hester Hsuan) has always been comfortable in the logistic position of file management. Because of fate, he will work with the Yuanzu-level Tuoqiang senior sister Chan Sam-yuan (Joyce Tang) and the male god of the Flying Tigers team Mung Hon-sam (Moses Chan) to solve the case. (Hui Shiu Hung) arranges to join the unsettled case team, and a group of police officers with their own "characteristics", under the leadership of Hon-sam, pursue unsettled cases that are not of concern to the outside world. Hon-sam was dissatisfied with On-na and fought each other until it was revealed that Anna was afraid of using a gun because of being hijacked, and the two sparked love! On-na meets again with Lau Tat-Wah (Him Law), a tuition student who was destroyed many years ago, but he has joined the underworld... Under the impetus of feelings and guilt, can On-na get back the pistol and re-energize her, and become a new generation of "armed lady cop" ?