Set against the stunning Scottish landscape in and around Dundee, this six-part thriller takes viewers into the world of forensic science. The story follows 23-year-old Emma Hedges, who takes up a new position as a lab assistant at the Scottish Institute of Forensic Science. While attending an online forensics course, she discovers that the fictitious case study has a strikingly similar and shocking link to her past. As Emma starts to dig deeper into the unsolved murder case, she soon realises she should trust nobody. With a help of two female professors, Sarah Gordon and Kathy Torrence, she works on bringing a killer to justice.