On a day that seems perfectly ordinary, Alice Halpern waits for her best friend Lauren at Carroll Park, the Brooklyn playground where they meet with their children every afternoon. But when Lauren doesn't arrive, and then fails to pick her son up from school, a normal day transforms into a nightmare.

The police desperately search for Lauren, who is nearly nine months pregnant. Close friends rally around her distraught husband and little boy, offering comfort and support. But hope vanishes when she is finally found... without her unborn child.

Alice, herself pregnant, realizes she's being followed and has the creeping fear that she and her unborn twins are also in danger. As the investigation intensifies, she is shocked as her familiar world begins to unravel. When the truth finally reveals itself, and the danger turns out to be rooted closer to home than anyone had ever guessed, she fights to save what little innocence remains.