Betrayed follows the lives of seemingly normal people, surrounded by their family, friends and lovers, completely unaware that their days are numbered. But when we take a look closer, we see that the smiles on the faces of some of their so-called loved ones hide dark hearts and dirty deeds: thefts, affairs, love triangles... and finally, the ultimate betrayal – murder. In each episode, investigators, family and friends peel back the layers and facts of each shocking case. The new season starts with the story of confident, motorcycle-riding Diane Snellen – a single mum trying to make her way in the world while navigating the dating scene of Georgetown, Kentucky (US). But her life comes to an abrupt end when she's brutally stabbed in her own home.