The officers of Ashfordly find themselves out of their depth when the village is plagued by a series of explosions that seem to revolve around an ambulance driver, a shopkeeper - and Gina Ward! Meanwhile, Vernon and David are hired by Lord Ashfordly to restore his family's rundown church to its former glory, but a bogus vicar seems hell bent on stopping them.

Mike clashes with a cattle market auctioneer with a shady reputation and finds himself under suspicion for police corruption. To make matters a lot worse, Jackie makes a devastating revelation that tears the village bobby's world apart. Meanwhile, Vernon goes into partnership with one of his neighbours to bottle and sell "the Aidensfield spring water", but they face competition in Lord Ashfordly when he discovers the source of the spring is on his land.