In this final story of The Carmarthen Underground, a mummified body is found deep beneath the Welsh Consulate in north London, prompting fears of yet more traitorous behaviour in the Welsh capital.
While the agents of Carmarthen Intelligence investigate, the people of Myddfai are haunted by strange phenomena and Rhian Jenkins realises that the time has come to say farewell.
So we say goodbye to our friends in Carmarthen: to Dai Sewin, whose strong arms still steer his coracle along the Towy, to Aneurin, Wyndham and the Boss, who continue to protect the people of Wales from their enemies, to the Jenkins family and the faithful population of Myddfai.