A Spinoff of <Castle 2: Pinnacle> - An action drama featuring Saroka 'Seo Jintae'! Jintae becomes a killer after being saved by a man when he was at life's lowest point. While searching for his long-lost sister, he discovers that his younger sister is in Hong Kong and deeply involved with the Triad, Hong Kong's largest criminal organization. Thus begins Jintae's journey as he confronts the Triad in the nighttime streets of Hong Kong while searching for his sister.