Laura Conroy is a woman who has a loving husband, two children, and a successful career as a lawyer. She appears to have it all, but this perfect life is marred by cracks. After befriending Emily Furness, a charismatic stranger she meets in a school playground, her life begins to spiral out of control. In reality, Emily has a hidden connection to Laura that reaches deep into her past, and she is determined to be Laura's ruin. In order to regain her tranquil life, Laura must discover the truth before it is too late.