Catalina's as a prostitute tells the story of Catalina William, a stunning and beautiful woman from a poor background who becomes a prostitute. Initially, prostitution wasn't her priority, but circumstances led her to it, with a friend named Evelyn introducing her to the profession. Catalina adopts the name Olivia for her work. As she navigates this life, Evelyn becomes a tormenting presence, especially when Catalina's fallure causes clients to lose interest in Evelyn. Despite the challenges, Catalina's beauty makes her irresistible to many men. She befriends Mishel, who advises her to leave prostitution and pursue a conventional relationship. Catalina attempts this, but her relationships don't work out, leading her back to prostitution. She eventually reconnects with George Leo, a client she had feelings for during her initial phase in the profession. The story explores whether Evelyn succeeds in ruining Catalina's life and how Catalina's relationship with George unfolds.