After leaving London for the rustic Welsh landscapes, a tormented detective finds himself in a place with secrets as dark as his own. R n r nTom Mathias comes to Aberystwyth after abandoning his life in London. He is a bright but troubled man. Despite his mistakes, he is an excellent detective, who knows that the key to solving the crime is not where you are looking for the truth, but how you look. From the sand dunes of the coastal sand to the bad areas of the hinterland, Y Gwyll is a series of four two-hour stories that are original and local, but always universal.