Traumatised by the tragic death of her twin brother, Brianna falls into a state of deep depression, isolating herself from the world and all those that care about her. When a twist of fate reveals that she has a half-sister she finds a new purpose in her life and sets out to find her sibling, desperately hoping she can fill the void left in her world.
Poppy has not enjoyed the same privileged lifestyle as her sister while growing up. Abandoned into the care system at the age of eight, she has encountered both physical and sexual abuse for most of her life. Passing through the hands of more care homes and foster families than she can remember, the damaged product of a broken upbringing, Poppy has never found a place to feel truly safe. Kicking back at society, she turns to drug abuse and acts of extreme violence to escape from reality.
When the two siblings are finally united, they discover that they have much more in common than their DNA. Their paths are shrouded with sinister secrets of betrayal and regret and both girls share a deep-rooted hatred for one of their parents. As the dark truths of their lives are unveiled they realise that nothing can ever be the same again...