Third-year basic surgical trainee FAN TSE-YU is on her way to Mercy Hospital on her first day of placement, during which she gets stuck in a traffic jam caused by a car crash. Primary school boy TO TZE-LAM is injured in the crash, but is saved by final-year higher trainee in Neurosurgery CHEUNG YAT-KIN who happens to pass by. Having finished their medical studies in the Faculty of Medicine, YEUNG PUI-CHUNG and his classmates start their housemanship in Mercy Hospital. YU, CHUNG, TONG HON-PONG and HUNG MEI-SUET report for duty at the Neurosurgery Department and start to visit various wards in the company of KIN. KIN and YU are impressed with SUET’s venipuncture techniques while CHUNG is so careless that he has caused the patient to suffer a great deal all through the process. YU thinks that KIN is being too harsh with CHUNG and has a very bad impression of him……

YU meets an enthusiastic nurse called HOI-KI, through whom she gets to know KIN’s mother WONG SIU-ANG, who is working at the hospital as a cleaner. Male nurse LUI SIU-YIK is outraged at being called “male mistress” and picks an argument with the patient. Matron TO KA-MAN turns up suddenly and blames YIK for amending the duty schedule and being absent from work without any permission, but YIK explains that he needs to look after his son and is left no other options. KIN asks CHUNG to do the follow-up at the admission ward but CHUNG is so lazy that he has only spent a little time inputting data into the computer, for which he gets rebuked again by KIN. KIN goes downstairs to pick up his younger brother YAT-HONG, who is paralyzed and seated in the wheelchair. The brothers get along well and their closeness is well evidenced through their causal chat along the way……

YU learns from a few nurses that someone is urinating in the public area of the hospital, following which she sees Principal CHAN peeing somewhere nearby. While discussing Principal CHAN’s brain tumor operation, everyone believes that MAN is highly unlikely to select KIN as his first assistant. Realizing that SUET has been so aloof recently, YU tries to have a word with her in a bid to clear her misunderstanding but SUET… SUET goes to her grandmother’s birthday banquet with her parents HUNG KWOK-WAI and SZE YUK-LAN, during which her grandmother means to mention LAN’s ex-husband NGOK and gives WAI the cold shoulder. CHUNG goes to practice fencing at the gymnasium, where he meets HONG and befriends him. MAN demotes KIN as his second assistant in order to humiliate him. The news has soon spread around the hospital and everyone who knows KIN feels sympathy for him……

KI would like to hold a celebration party for KIN but KIN does not seem to welcome the idea at all. Believing that KI is KIN’s girlfriend, YU gives KIN a good telling-off for his poor attitude towards KI. In order to pick up the necessary clinical knowledge of different specialties, CHUNG decides to make use of his rest time and do some practice in the Orthopedics Department. A huge host of distinguished guests have come to the grand opening of NGOK’s privately-run clinic. Noticing how KIN has tried to greet the guests one by one, YU shows a look of disgust while MAN starts to dislike him more and more. HONG would like to take part in a canoe expedition, which is objected by KIN at once. But ANG gives in to HONG’s persistent requests and finally lets him go in secret. CHUNG calls HONG up and is surprised to hear that the coach is not coming to take care of the lad……

YU witnesses a nurse being sexually harassed by a patient. She is about to intervene but is stopped by KA-MAN. What KA-MAN says seems to have inspired YU in some way. With his relentless efforts, CHUNG’s venipuncture techniques have improved a great deal, which is highly appreciated by his patient LAM SAM. LAN has not seen SUET for a couple of days. She is so worried about SUET that she decides to pay her a visit at the hospital, where she runs into YU. YU is actually her long-lost biological daughter. LAN tries to dig up more about YU from SUET, and SUET admits that she is well aware of YU’s identity. Without any favorable impression of the FANs, SUET insists that she has nothing to do with this family. Upon receipt of the complaint by CHIU, the Hospital Chief Executive decides to hold an urgent meeting, in which MAN shifts all the blame onto KIN. YU drives KIN back to her home for dinner……