Hidden in a peaceful corner of the Monmouthshire countryside is a site steeped in blood, treachery and revenge. Plodcast host Fergus and his son Owen set out one cold January morning to uncover the secret of medieval Castell Arnallt (Castle Arnold) - and track down what remains of this ill-fated and now forgotten Welsh castle. Contact the Plodcast team and send your sound recordings of the countryside to: [email protected]. If your letter, email or message is read out on the show, you could WIN a Plodcast Postbag prize of a wildlife- or countryside-themed book chosen by the team. Visit the Countryfile Magazine website: countryfile.com Learn more about your ad choices. Visit podcastchoices.com/adchoices