PC Crane and PC Bellamy give chase to a couple of hooligans in a car. When they pass the bus stop in Aidensfield Paul Dibley is teased by a school friend and runs right smack into the side of Bellamy's passing police car. He suffers only a broken leg and some bruises, but his father Don wants PC Bellamy prosecuted. Paul's sister Tracey has just started as a maid at Ashfordly Hall when it is discovered that she is pregnant. Understandably she is afraid to tell her father especially since the father of the baby is her cousin Lenny. To make things worse Tracey gets a crush on PC Crane and names him as the father instead when her parents find out about her pregnancy.

When rev. Jacob Thwaite returns to his vicarage he finds that the place has been broken into and his wife Louise stabbed to death. The organist Terry Thorne remembers seeing a tramp watching the vicarage, but DC Dawson suspects the vicar himself. He has an alibi though. Ivy Green and her psychic driver Rosa take lodgings at the Aidensfield Arms. They have come to assist the police catching the murderer. Furthermore they have a message for the vicar from Louise. PC Bellamy nearly runs down a drunk and decides the man would better spend the night in the cells, but Sergeant Miller will rather have the drunk taken into the interview room because he is PC Younger's father. Aunt Peggy needs to catch 200 trout and has a very explosive way to do so.