When elderly teacher Peter Farquhar was found dead at home in the village of Maids Moreton in 2015, it was sad and unexpected, but no one thought it suspicious. But 18 months later, when his neighbour Ann Moore-Martin also fell ill and died, the police decided to look again. They found that Ben Field, a would-be vicar and academic, had recently become part of both of their lives and benefited from their wills. This programme shows that by delving back in time through friends' and loved ones' memories of Peter and Ben's relationship, as well as Peter's diary, the police discovered a story of love and betrayal.