Social Media can be the death of you … The Snapchat A twisted killer comes to the attention of DI Gus McGuire and his team when a teenager receives a Snapchat image of his murdered friend. The Killer As the killer becomes bolder, using social media to publicise the murders, Gus fears there may be more than one murderer targeting young people. The Stalker Meanwhile, Gus comes under threat from a stalker who is not afraid to get up close and personal. Can Gus protect his loved ones and catch the killer before another Snap is received?