When Lorna gets a chilling text from ex-lover Andrew, she feels her perfect life start to unravel around her. Everything in Lorna;s life runs like clockwork, from her 6 a.m. morning run to the strict 60-minute counselling sessions she gives. It's the only way she can deal with the terrible secret she carries. The secret she thought she was finally free from. Because the only other person who knew it was Andrew.