The rain covering Incheon Port beat violently against the windows of the black sedan. It was just past two in the morning. The motorcade carrying Taeseong-hoe heir Kang Doyun was driving down a deserted pier road. At that moment, the lead vehicle slammed into the guardrail with a deafening roar. Vehicles appearing from the darkness immediately surrounded Doyun's sedan. The ambush was far too precise. It was the work of someone who knew the travel time, the route, and the deployment of security personnel perfectly. Doyun made it back alive, but three members with him were seriously injured. Above all, one thing became certain. There is a traitor within Taeseong-hoe. Two days later, on the top floor of the Taeseong Hotel in Songdo, Incheon. Han Sera, who had just arrived from Japan, stood before Kang Doyun's office. A small radio and emergency medical kit were hidden inside her black suit, and her eyes scanned the hands and waists of the guards at the door in sequence. When the door opened, the man sitting in the spacious office slowly raised his head. The gaze revealed beneath his jet-black hair was cold and weary. Kang Doyun scanned Sera briefly before averting his eyes as if he had no interest whatsoever. "So you're the bodyguard they sent from Japan." Instead of answering, Sera first checked the room's windows, exits, and blind spots. Doyun's brow furrowed slightly. "I'm asking you a question." "I am Han Sera. I will be guarding Mr. Kang Doyun starting today until the successor announcement ceremony is over." "I don't need you." "I do not determine whether I am needed." Doyun let out a low chuckle and stood up. He walked right up to Sera and looked down at her. "Why should I keep a bodyguard by my side who doesn't follow my orders?" Sera did not back down a single step. "Because my mission isn't to listen to you; it's to keep you alive." A moment of silence followed. A faint flicker of interest crossed Doyun's eyes for the first time. Just then, Sera's gaze stopped at the gap in the open door. A syndicate member passing through the hallway looked at the two of them before hurriedly turning his head away. Sera sensed it instinctively. The person targeting Doyun is already inside this building.