Terri Harris was a loving mum who had no way of knowing that the man she'd met online had a dangerous history of crime, violence and abuse. He would go on to embark on a shocking murder spree that would leave him branded a ‘psychopath'. In this first episode, Terri's family and friends give first-hand accounts of how they warned Terri about Damien Bendall after uncovering glimpses of his evil past online – only for Bendall to manipulate his way into staying with Terri­, with tragic consequences.

Tai O'Donnell was a talented musician, but his ambitions were cruelly cut short after he met Kamila Ahmad. Devious and manipulative, Kamila managed to hide her violent past and keep control of Tai – and when he tried to leave, she stopped him in the most brutal way possible.