Set in Hamway's Hardware Store this sitcom follows the lives of its fanatical DIY staff Mike, Kenny, Steve and Rex.

　　When two bodies are discovered by the side of a fishing stream, Barnaby and Troy have yet more murders to solve. Isobel Hewitt had a zest for life that some can only hope for. She loves to drive her red Jaguar at top speed and generally enjoyed the finer things in life. Although loved by many, there were those who weren't quite so charmed by her. Margaret Seagrove was convinced that she was the member of the local fishing club using weighted lures in the local stream. Her nephew and his wife, with whom she resided, saw her as a burden now that she had spent most of her accumulated capital. The second victim is the local doctor, Duncan Goff, a well-known philanderer who had affairs with many of the local ladies. The police must first determine if both were intended victims or if one was simply in the wrong place at the wrong time.

　　A cave in of a local canal tunnel under restoration reveals the skeletons of eight individuals. While most of the skeletons are from a cave in when the canal was under construction in the 19th century, one is obviously of a more recent vintage. Dental records identify him as Eric Edwards who was reported missing in 1965. Supt. Barnaby delves into the history of the canal to see if he can find a connection. DS Troy is over the moon when he learns that he has qualified as a Detective Inspector and that there may be a job for him in another county. In what may be his last case in Midsomer, he follows up on an anonymous tip that teenagers are harassing a local hermit, Tom. When one of those teenagers is shot through the head, Barnaby leaves "Inspector" Troy in charge of the case.