In the covert world of espionage, where secrets outweigh lives, the Concordia Initiative operates as a silent guardian of global stability. Built from the ashes of post-war chaos, it is an organization shrouded in secrecy, its agents the best of the best-ghosts who walk the fine line between hero and criminal. Suh Youngho, a seasoned field operative with a decade of experience, is one of Concordia's finest. But even the sharpest agents face challenges they aren't prepared for. When a new mission forces him into uncharted territory-posing as a devoted spouse-he must navigate not only the dangers of the assignment but the vulnerabilities of his own heart. Alongside a team of skilled yet wildly different operatives, including rookie researcher Jung Jaehyun, Youngho embarks on a journey where trust, deception, and survival collide. Beneath the layers of fabricated identities and high-stakes missions lies the question: How much of yourself can you sacrifice for the greater good before losing who you truly are?