When retired cop, Albert, arrives in Stilton for a festival, he has cheese on his mind, but that's not what he gets ... ... arriving the morning after the factory and warehouse have been raided, all the stilton is gone, and the security guard, Dave, who bravely fought to stop the thieves, needs someone's help to save the day. With sidekick Rex Harrison, the failed police dog, at his side, our aging but sprightly hero will put his ear to the ground and his mind to work as he unravels the clues to this mystery. Rex and Albert will be tested like never before in this quiet English town as they catch the first glimpse of a criminal mastermind at work. Can they find the cheese in time to save the festival? Will Rex be able to smell the answer with all the stinky cheese around? It's a race against time to solve this crime but is there something bigger going on? Can this really just be about some mouldy cheese?