SANG passes the evidence to FUNG for further investigation. Actually, FUNG also suspects ON and discovers that PING has written letters to ON occasionally. Due to the urgency of a proposal, KEE purposely engages KI to perform overtime work in order to complete the task. Hence, KI absents for the appointment with GI. Unexpectedly, GI astounds KI by bringing snacks to his office, thus, ruins the plan of KEE. After serious consideration, SANG gets a breakthrough in LI’s case. He figures out the communication channel between PING and ON at last. Moreover, he predicts the mask murderer will take revenge on SING; therefore, he hurries to save him. But, his arrival is too late and SING dies. Special police officers are appointed to investigate the case of mask murderer. SANG explains to them about the secret code of the bible that PING uses to inspire ON.… ...