A series of illegal knuckle fights has been taking place all over North Riding and sergeant Blaketon asks his constables to look out for Irishman Michael O'Leary, who is suspected of being behind them. Not surprisingly O'Leary is spotted at Claude Greengrass's place. Martin Lessor is attacked in his home, but the attacker Victor Kellerman is much more eager to see the case in court than Lessor is. To complicate matters Lessor, who is a diabetic, will only allow Alex Ferrenby to look into his medical files, but Ferrenby is away on a fishing trip.

Lesley Ford's father went missing in action during World War. A few days before her wedding to Barry Lee she finds a piece of a shot down Mosquito fighter on the moors. Following the visit to a fortune teller at an amusement park on her hen night she postpones the wedding until the plane's pilot has been found and given a proper burial. To save his upcoming marriage Barry tries to find the spot where the Mosquito hit the ground. But the crash site is considered a war grave and the Ministry of Defence do not take it lightly when someone messes around with war graves without authorization. and to top it off two more shady characters are caught lurking around the supposed crash site. A new, very officious bobby turns up out of nowhere in Aidensfield and Ashfordly But not even Sergeant Merton has heard of any new bobby being transferred to the area and the police must face the fact that the have a bogus bobby on their patch.