圣幕伦私人医院有着几位做事颠倒的英联邦实习医生，罗保罗、福克兰、金子文（文隽 饰）和李雨文（张坚庭 饰）在主治陈医生（陈友 饰）治下整日无心救人。医务署接到病人投诉，前往圣幕伦调查医师水平与硬件设施，院长想出对策，令护士长谷琳达（林建明 饰）主持整改。谷琳达随即召入大批新护士，方小敏等姑娘如愿进入了护士岗位。深谙实习医生手段的谷琳达又召入一名男护士阿旦（郑丹瑞 饰），以便时时保护护士不受实习医生们的骚扰。可罗保罗等人怎肯善罢甘休？一群年轻人在医院内外闹出连场笑话。与此同时，奇怪的病人、医护之间的恶作剧充斥着整家医院，医务署再次调查圣幕伦之后得出的结论依然不理想，究竟圣幕伦众医护如何才能得到患者和医务署的认可呢？

This film is a Hong Kong version of the British Carry On films, this one specifically set in a hospital. The hospital is full of inept people, so Miss Kuk (Meg Lam) vows to the board that she will reform it. This involves the recruitment of student nurses, keeping in check some silly interns and dealing with Dr. Chen, whose wife just left him.