'There are some things in life better not known - some things that should be left where they rest...' Erin Paterson is a highly successful lawyer in Glasgow and a control-freak, ruthless negotiator and commitment-phobe. Erin's family exist in a state of perpetual denial, so that when a secret from the past, so abominable and terrifying, slithers back to the surface, Erin is the one who has to face the threat and find the truth. As events unravel, Erin's resolve is tested to the maximum. Can she hold onto her job - and her life, when the past crawls out of the darkness to expose a secret in the family that no one dares confront?