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, the man she shot.  When Lynch's true identity is uncovered, a UK officer, DSI 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.  As Jason's partner Fiona grows suspicious of Shelly, we learn of the measures Shelly took to change her identity.

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.