Cameras follow every twist and turn of a real-life police investigation as detectives attempt to catch a suspected drug trafficker before he can escape on a flight to Spain.

A coroner has asked police to look into the sudden death of a 48-year-old woman. When DS Graham McMillan, who has dealt with over 200 murders during his career, is sent photos of the dead woman, they immediately raise suspicions. He says 'You do get a hunch just through experience, something isn't right... I've looked at the photos that were taken of the lady in situ and what concerns me, is some of the bruising around the chest and the neck area.' His next step is to 'look at what we've got in front of us and say 'something doesn't seem right here'.