CHIT is sent to the casualty. Senior Doctor YIN suspects that CHIT's nerve is suppressed by some abnormal cells of her brain. However treatment is difficult and dangerous. The chance to cure her with operation is low but if there is no further action, she will remain in the comatose forever. Meanwhile CHING leads another doctor BENNY to see CHIT. BENNY is an expert on brain and he discovers that the X-ray film with bad brain cells do not belong to CHIT. CHIT is still unconscious as she is under an anesthetic by an injection. Later YIN resigns and is found dead mysteriously. The police cannot find SHUN. NGAN's wife informs the police that NGAN and SHUN had been blackmailed for one million dollars before NGAN was killed. YUNG suspects that they were threatened by CHOI, who is the husband of their former patient. He did so to avenge his wife's death.