KIM-HANG is very nervous to learn that YIP TING is injured during the gunfight and he rushes to the hospital to visit her. LOK-MAN feels that YIP TING is hiding something away from them but KIM-HANG believes that YIP TING is not suspicious. YIP TING meets Professor WONG secretly and Professor WONG tells her truth behind her father's death. Professor WONG surrenders himself to ATF and he requests for protection. He also provides all the research information of thallium to ATF. With the help of YAT-KA, YAU-CHING finally recovers the data and the doctors develop an antidote successfully. CHI-NGO tries to draw the Scaredy Bird out with a substitute. He suspects that there is a spy in ATF and he asks YAU-CHING to take Professor WONG away secretly. However, CHI-NGO's plan is exposed and the Scaredy Bird sends a group of people to attack the safe house……