Sir Lancelot Spratt, respected and much feared senior consultant at St Swithan's has finally taken the plunge and retired to enjoy the quiet life. No longer able to fill his days terrorising staff and patients alike, he turns instead to a new passion – a spot of trout fishing. However his solace and quiet reverie at the fishpond is soon broken by his niece – the mischievous and rather attractive Euphemia. With her engaging smile (and with her glands the way they are) it is not long before a young physician falls madly and helplessly in love with her. And if this wasn't enough to deal with, Sir Lancelot's neighbour announces that he alone has fishing rights to the pond.