Complex sentence: Series 2 contains the most graphic portrayal of prostitution and has Tracy perform in some explicit sex scenes, the main story and character arc of the sequel is based around Tracy as her drug addiction become worse and leads her to psychosis.
Split into simpler sentences: Series 2 contains the most graphic portrayal of prostitution and has Tracy perform in some explicit sex scenes. The main story arc of the sequel is based around Tracy as her drug addiction becomes worse and leads to psychosis.