For a decade and a half, Rachel Cunningham has chosen to lock herself away in a psychiatric facility, tortured by gaps in her memory and the certainty that she is responsible for her parents' deaths. But when she learns new details about their murders, Rachel returns, in a quest for answers, to the place where she once felt safest: her family's sprawling log cabin in the remote forests of Michigan's Upper Peninsula. As Rachel begins to uncover what really happened on the day her parents were murdered, she learns --- as her mother did years earlier --- that home can be a place of unspeakable evil, and that the bond she shares with her sister might be the most poisonous of all.

Helena Pelletier has a loving husband, two beautiful daughters, and a business that fills her days. But she also has a secret: she is the product of an abduction. Her mother was kidnapped as a teenager by her father and kept in a remote cabin in the marshlands of Michigan's Upper Peninsula. Helena, born two years after the abduction, loved her home in nature, and despite her father's sometimes brutal behavior, she loved him, too...until she learned precisely how savage he could be. More than 20 years later, she has buried her past so soundly that even her husband doesn't know the truth. But now her father has killed two guards, escaped from prison, and disappeared into the marsh. The police begin a manhunt, but Helena knows they don't stand a chance.