Episode list

Serena leaves Leeds with her doctor husband Evan and their daughter Vee to be close to their terminally ill mother Rachel in the seaside town in which Serena was raised. When the police stop her for speeding Serena panics and it becomes evident that she has a past. A decade and a half earlier,as a school-girl,she had an affair with sexy teacher Marcus Hansley though he forced himself on her and ended up being stabbed to death. At the same time as Serena's return another woman Poppy Carlisle is released from prison after being sentenced for Marcus's murder and goes to live with her mother Liz and stepfather Jim in their pub in the same town. She is befriended by Al,a lifeguard. Poppy has always claimed she was innocent of the murder and seeks out Serena's husband,visiting him as a new patient.

Hearing that Poppy visited Evan Serena considers asking her probation officer to revoke her parole as she is breach of a restraining clause. However Serena recalls her affair with the bullying Marcus,whom she knew she was sharing with Poppy though only Poppy was convicted of his slaying. At the time Poppy felt the need for solidarity because of his violence but Serena rejected it. Possibly because of this she does not report Poppy though she later finds that Poppy has engineered a meeting with Vee as well as spying on the house at night. Al agrees to help Poppy prove her innocence and suggests they trace Marcus's girlfriend at the time Marlene. However he turns up at Serena's house,announcing that he is a journalist out to get the truth as to what really happened.

After Al's visit Serena confronts Poppy and warns her to keep away but Poppy is angry that Al lied to her about his interest. He nonetheless vows to help her prove her innocence. Poppy is arrested for breach of her restraining order thanks to Serena's sister Fez and for the first time Evan learns of his wife's past and walks out on her,taking Vee. Serena visits Poppy in her cell and they recall the night of Hansley's murder,which prompts Serena to meet with Al and seek out the dead teacher's girlfriend at the time, Marlene,who now has his child. Having blotted out the past for years Serena discovers that her mother was aware of what happened when Marcus Hansley died and holds the key to the truth which will ultimately exonerate Poppy and allow her to lead a new life with Al.