The series finale of 'The Summer I Turned Pretty' focuses on Isabelle 'Belly' Conklin's journey of self-discovery and her complex relationships with brothers Conrad and Jeremiah. After spending a year in Paris, Belly has transformed into a more confident individual, navigating her feelings as Conrad arrives to confront their past. The episode captures their emotional reunion, marked by romantic tension and Belly's internal struggle between her past and present selves. As she grapples with her choices, Belly ultimately decides to prioritize her own identity over romantic entanglements. The finale not only resolves the love triangle but also highlights Belly's growth, making her a relatable and nuanced character in teen television.