A conspiracy thriller, "Paranoid", tells the story of a female GP who is murdered in a rural children's playground with an abundance of eyewitnesses. A group of detectives embark on what seems to be a straightforward murder investigation, but as they delve deeper into the case they are quickly drawn into the twists and turns of an ever-darkening mystery, which takes them unexpectedly across Europe. The murder of a female GP in a rural playground in front of numerous witnesses draws a group of detectives into an ever-darkening mystery that takes them across Europe, aided by mysterious notes sent by the "Ghost Detective".