So Moon Joo (Jeon Ji Hyun), an experienced diplomat and former ambassador to the United States, has earned the trust of the global community thanks to her sharp mind and decisive actions. When she uncovers the political intrigues behind a high-profile murder linked to both South and North Korea, she finds herself entangled in a dangerous web of secrets. Meanwhile, Park San Ho (Kang Dong Won), an elite mercenary with a mysterious past and unknown citizenship, operates in the shadows. Taciturn but deadly accurate, he becomes an unexpected ally to So Moon Joo in her quest for truth. Together, they navigate through a perilous world of power, deception, and hidden conspiracies, where revealing the truth could mean risking everything.
