In this prequel to the international best seller The Ruin, set 10 years prior, bright-eyed Carrie Ryan is at the very start of her career. When she has a hunch about an ongoing murder investigation, she knows it could be her only chance to prove herself and truly break into the “boys' club” of Dublin’s police force.

Janie Klassyn was only 14 years old when she made the blood pact with her friends. She could never imagine she was setting in motion the horrifying crime that would tear her peaceful prairie town apart. Twenty years later in California, school counselor Emma Grant struggles to keep her past buried. But when she finds a note on her car threatening to reveal her secret, it becomes harder to keep up the deception. Even her teenage stepdaughter suspects that Emma is hiding something.

Nina and Simon are the perfect couple. Young, fun and deeply in love. Until they leave for a weekend at his family’s cabin in Vermont, and only Simon comes home.

When Dr. Sloan Hastings submits her DNA to an online genealogy site for a research assignment, her goal is to better understand the treasure-trove of genetic information contained on ancestry websites. Brilliant and driven, Sloan is embarking on a fellowship in forensic pathology, training under the renowned Dr. Livia Cutty. Sloan has one reservation about involving herself in the experiment: she’s adopted. Grateful for a loving home, she’s never considered tracking down her biological parents.

Lilian and Rosie were once the closest of sisters, but the untimely death of their parents pulled them apart. Now, three years on, Rosie has reached out to her big sister, asking to meet. Driving on an icy road in the middle of a snowstorm, Rosie admits that she has something important to tell Lilian—a secret she describes as a matter of life and death. But before she has a chance to tell Lilian, a car careens into theirs, with devastating consequences. Lilian is convinced that someone deliberately rammed Rosie’s car. But why?