It’s May 2010 and a woman seemingly vanishes into thin air from the centre of Edinburgh, Scotland. The case quickly moves from a missing persons inquiry to a murder investigation. The main suspect is her jealous ex-lover and colleague, David Gilroy.

Darrell and Sophie meet David Gilroy from behind bars in Scotland. They examine his turbulent relationship with Suzanne Pilley, and how the police came to the conclusion of foul play.

CCTV led to David’s conviction. But David also believes it’s one of the pieces of evidence which is the key to proving his innocence. Darrell and Sophie question how far can the CCTV evidence be trusted?

It seems impossible that someone could disappear without a trace from a Scottish city. But, in 2010, two women vanish from Edinburgh. Darrell and Sophie investigate the sighting of a mysterious blue car close to the scene where Suzanne vanished, a lead that was never traced....

Darrell and Sophie visit the basement of the David and Suzanne’s Thistle Street office - the crime scene, according to the prosecution. And they dissect the day of the alleged murder, moment by moment.

Darrell and Sophie head west from Edinburgh to the remote forests of Argyll, re-tracing the steps David Gilroy is said to have made on the day he disposed of Suzanne’s body.

Forensic evidence is the cornerstone of most prosecution cases. Darrell and Sophie ask one of the UK’s leading forensic scientists what happens when there isn’t any?

David Gilroy’s conviction was based on circumstantial evidence. Darrell and Sophie bring his trial to life, and examine the unique aspects of the Scottish Justice System.