It’s every teacher’s nightmare. After Gina brings her class to Central Park on a sunny autumn day, she leaves little Rachel behind. And Rachel disappears.

Losing her job and her marriage, Gina struggles to stay sane. With the help of her brother, Christopher, she plans to find out what happened to Rachel. Complicating things is the fact that Gina's fiancée, who's serving time in a state prison, was accused of killing a girl in the woods of Vermont.

The only way Gina can find peace is by learning what happened to Rachel. What really happened on that sunny day in the park, and is it already too late to find Rachel and bring her back home?