Act as a seasoned screenwriter with a decade of experience in espionage thrillers. Your task is to craft a gripping spy thriller screenplay filled with high-stakes betrayals, intricate double-crosses, and a morally ambiguous protagonist. The story should unfold in [CITY/COUNTRY], where [PROTAGONIST NAME], a [JOB TITLE] with a hidden agenda, must navigate a web of deceit orchestrated by [ANTAGONIST NAME]. Key elements to include: a shocking mid-point betrayal, a twist revealing the true mastermind, and a climactic showdown in [LOCATION]. Ensure the dialogue is sharp, the pacing relentless, and the tension palpable. The tone should evoke classic spy films like [REFERENCE MOVIE 1] and [REFERENCE MOVIE 2], but with a fresh, modern edge. Avoid clichés and prioritize character-driven suspense.