Days before her fortieth birthday, career woman Emma stops sleeping - just like her mother did before suffering a violent psychotic breakdown when Emma was five. Emma's mum always said that she shared the same "bad blood," and now Emma's terrified it's true. Worse still, Emma can't help but feel like something else is amiss - her mother is suddenly dead, her estranged sister has resurfaced, and she feels like she's being watched. As her world begins to unravel, it's only by investigating the truth of her past that Emma can find the answers she needs to prevent tragedy from striking again.