FAI works in LAI's clinic with FUNG's help. He investigates KIT's health program. He suspects KIT's program. He even requests KIT to explain. KIT aware that FAI is an obstacle to him. KIT uses FUN's elder sister, LING, to set FA up. Though FAI could escape from the charge, it makes a breach between FAI and FUNG. YIU asks TAI to kill BILL. TAI wants to withdraw from the martial world. YIU kidnaps TAI's son, HON, so as to force TAI killing BILL for him. When FAI has known the case, he hurries to rescue HON. Then he goes to stop TAI killing BILL before he made a big mistake.