When a woman is found brutally murdered, evidence discovered at the scene links the murder to a 20-year-old unsolved crime. Detectives and old flames Molly McGee and Alex O’Connell are reunited after a long absence to solve the crime.

Devastated by Daisy’s death, Molly discovers a mysterious symbol that ignites her desire to track down Freddie. Alex makes a traumatic visit to Jenny McGinty’s mother, Eileen.