Carrie was imprisoned having been found guilty of her husband's lover's murder. Tess who unpicks miscarriages of justice is asked to take on Carrie's case, realising that to do so may cause Tess to uncover the secrets she has been struggling to hide for a lifetime Through her job for Innocence UK, a charity which takes on alleged miscarriages of justice, she works tirelessly to uncover the truth. But when she is asked to take Carrie's case, Tess realises that if she is to help this woman, she must risk uncovering the secrets she has struggled a lifetime to hide .