As Park and Kim race against time to uncover the spy within their agency, they soon realize that the stakes are much higher than they initially thought. With tensions rising between North and South Korea, their investigation becomes a matter of national security. As they delve deeper into the case, they begin to unravel a web of deception and betrayal that has been going on for years. Along the way, they enlist the help of a North Korean defector, who has valuable information about Donglim and his network of spies. Together, they must navigate a dangerous world of espionage, where one wrong move could mean the difference between life and death. As the hunt for Donglim heats up, Park and Kim find themselves caught in a deadly game of cat and mouse, where the lines between friend and foe are blurred and trust is a luxury they cannot afford.