Tom Mathias comes to Aberystwyth having abandoned his life in London. He's a brilliant but troubled man. Despite his faults he is an excellent detective, who knows that the key to solving the crime lies not in where you look for truth, but how you look.
The past comes back to haunt DCI Mathias as he investigates the death of convicted killer Catrin John - could her death be linked to that of Iwan Thomas's?