Mutated H5N1 is discovered in Hong Kong and everybody in the healthcare sector is very nervous. Doctor YEUNG PUI-CHUNG adores his good friend Doctor KAN CHING-CHING but CHING-CHING suddenly resigned last year. Two of his good friends persuade him to let go but PUI-CHUNG continues to buy daily commodities for CHING-CHING. The patient Grandma HA TUNG-MUI starts a quarrel with Doctor HUNG MEI-SUET for MEI-SUET takes away her chocolates before surgery. Doctor CHEUNG YAT-KIN helps her to settle the problem. On the wedding day of male head nurse LUI SIU-YIK and female head nurse TO KA-MAN, YAT-KIN and his pregnant wife Doctor FAN TZE-YU agreed to go together but YAT-KIN forgets to bring their gift. TZE-YU's younger sister MEI-SUET picks her up instead. Pathology consultant doctor LOK MAN-SAN reveals in a media interview that a tourist called Mr WONG is believed to be infected with the mutated H5N1. If the virus is infected to other people, the result could be drastic. YAT-KIN witnesses a traffic accident and he rushes there to give treatments to the victims. He even performs an operation on the tour bus. Consultant doctor LAM TAI-KWONG calls for an urgent meeting to announce that Mr WONG is inside the tour bus. All tourists and medical staffs who had contact with him should be quarantined. During the time, TZE-YU is performing an operation for Mr WONG's wife YIP MEI. YAT-KIN learns that TUNG-MUI falls down accidentally and her condition is severe. YAT-KIN rushes back to perform an operation for her. (Source: tubitv)