Johnlung spent several years undercover as a Thai HK immigrant trying to make ends meet through servitude for the triads. Throughout his time there he had a frequent contacts and information that helped provide evidence to arrest the triads. As the first story arc investigates a cult and triads, he found out that both are related and with the interference of Yuen Fo-sang and backup from Giner, he helps arrest the triad gang leader and return to civilian and cop life. As the story progresses, he would develop a relationship with Wong Chi-ying (Gigi Lai) however due to misunderstandings they would have an on/off relationship. Ultimately Ying would die at the hands of Aaren Chong (Kevin Cheng) and Johnlung would go on a vengeance quest to kill him. In between his despair, he got drunk and had a one-night stand with Ginger, leading to her pregnancy. Eventually he would kill Aaren, but he said it was Aaren's greedy brother, Tim, that ended his life. Tim knew it was really Johnlung that killed his brother and Johnlung tried to kill him to eliminate evidence. Tim as caught by Johnlung and was about to kill him when Sang found him and try to convince him to repent. Tim got up and tried to kill Johnlung in the back, Johnlung thought Sang was going to shoot him and so they exchanged fire. When he realized Sang shot Tim and not him, he realized he made a severe error. He had Sang taken to a hospital and himself arrested. He would end up jailed, but used that time to reflect on his errors through Buddhist texts. When he finally was released, he's a changed man and he only desire to be a good father to his baby son. Ginger Keung (Yoyo Mung) started out as a lead investigator and officer, but due to her job her family felt she wouldn't find any male suitors. She eventually left the force and decided to become a specialized lawyer. Although she was involved with a fellow lawyer, she developed feelings for Johnlung. Eventually when she couldn't stand her boyfriend's devious ways, she broke it off and started spending more time with Johnlung. After Johnlung lost Ying, she tried to be a supportive friend, but she wanted more from him. This led to her pregnancy and her quest to try to convince Lung to change his ways as she's well aware that Lung's quest on vengeance has led him to manipulate evidence and attempt to eliminate Tim.