Seo Munju, an accomplished diplomat who once represented her country as ambassador to the United Nations, has built her career on negotiation, diplomacy, and maintaining fragile international alliances. Known for her intelligence and composure under pressure, she has long operated in the public eye, shaping policy through dialogue rather than force. But when a sudden and carefully orchestrated attack shakes the already delicate balance of power on the Korean peninsula, she is drawn back into the center of a rapidly escalating crisis. To prevent the situation from spiraling into open conflict, Seo Munju must work alongside Sanho, a highly trained international special agent whose missions are carried out far from public view. Unlike her, Sanho lives in the shadows, and much of his past remains hidden behind layers of secrecy. As they investigate the attack, the two uncover a web of covert operations, political manipulation, and hidden interests that stretch across borders. With tensions rising and global powers watching closely, Seo Munju and Sanho must combine diplomacy and covert strategy to reveal the truth before instability turns into a catastrophic confrontation that could reshape the future of the peninsula.