In one of the biggest investigations ever carried out by Tayside Police, evidence in the case of a pensioner's murder leads to a family friend. Hosted by British actress and presenter Kym Marsh, Murder at My Door with Kym Marsh returns to explore four more cases of innocent people murdered by someone they thought they could trust. The stories show that someone’s safe place, their sanctuary, is also somewhere they can be at their most vulnerable. In the show, Kym Marsh narrates with her distinct empathetic style the tragic deaths of Eric Hingston, William Saunderson-Smith, Margaret Fleming, and Linah Keza, victims who unknowingly opened their door to evil, experiencing the ultimate betrayal in the most intimate of settings.