Shelly Mohan, a housewife and mother of three, makes an irreversible decision, and commits an unspeakable act, when a man from her distant past surfaces...

Shelly's husband Jason, a Garda Detective, is delighted to be assigned to case, with no sense where the trail may lead. While he and his co-worker, Fiona, focus on a sex worker, Shelly realizes she may have left evidence in the hotel room.

We learn of Shelly's dark history, as a teenager who was part of a drug ring in London 20 years earlier with Charlie Lynch. When Lynch's true identity is uncovered, a UK officer, DCI Crichett, reopens an old murder case Shelly and Charlie were linked to.

The investigation continues to build steam in both countries, while Shelly continues to juggle her parenting and family responsibilities, problems with her husband and children that would stress anyone. Jason's partner, Fiona, grows suspicious of Shelly...

Shelly tries to change her fingerprints, while the investigation in London is developing new leads despite political pressure to close the case. New witnesses give descriptions of the suspect that may point to Shelly.

The pressure builds on all fronts as Jason tries to close the case Will Shelly be able survive as the pressure builds? The one option closed to her is to flee, she would never leave her children.