1987, Seville. Unit 7 special police squad with a particularly important task: to purge the city from prostitution and drug trafficking, putting an end to the all-corrosive power that has captured the street. The head of it are Angel, a young officer who seeks to become a detective, and Raphael, a cruel and arrogant, but very effective and experienced cop. The main method the Unit 7 uses is the fight against crime to circumvent the law by using violence, threats, half-truths and lies. For them, all means are good. As they move forward in their mission, the two officers get on different paths. Angel is passionate about his ambitions, and Rafael suddenly finds himself bound and falls in love with a beautiful young woman Lucia, whom he picked up on the street.