Episode 6

S1 E6: With the Phecda Bureau finding out that it's KWAN CHIU who made the poison, CHUEN-KUNG and the others go to arrest KWAN CHIU and bring her to justice. KWAN CHIU bears a grudge against the Bureau after she is tortured during the interrogation, so she forces some civilians to swallow the poison. Finally, CHUEN-KUNG knocks her unconscious and sends her out of Bianjing. Constable KWAI-CHEUNG is attacked and suffers severe injuries, lapsing into a coma. He is rescued by PAK-NIN and his team who take him back to the Phecda Bureau. KWAI-CHEUNG turns out to be a spy, who penetrated into the Jin Dynasty and uncovered that there have been Jin moles in the Song Dynasty. Unfortunately, the confidential correspondence with a full log of details has vanished without a trace. CHEUNG-SING encounters his old acquaintance CHAU-YUET, who doesn't recognize him.