When a retired detective superintendent chooses to take a culinary tour of the British Isles, he hopes to find tasty treats and delicious bakes ... ... what he finds is a clue to a crime in the ingredients for his pork pie. His dog, Rex Harrison, an ex-police dog fired for having a bad attitude, cannot understand why the humans are struggling to solve the mystery. He can already smell the answer - it's right before their noses. He'll pitch in to help his human and the shop owner's teenage daughter as the trio set out to save the shop from closure. Is the rival pork pie shop across the street to blame? Or is there something far more sinister going on? One thing is for sure, what started out as a bit of fun, is getting deadlier by the hour, and they'd better work out what the dog knows soon or it could be curtains for them all.