Artist and spa owner Penny Brannigan has been asked to organize a formal dinner to mark the centenary of the armistice that ended World War One. After dinner, the guests adjourn to the library for a private exhibition of the Black Chair, a precious piece of Welsh literary history awarded in 1917 to poet Hedd Wyn. But to the guests' shock, the newly restored bardic chair is missing. And then Penny discovers the rain-soaked body of a waiter. When Penny...