When her child is lost, she'll do anything to find him…Heike Lerner has a charmed life. A stay-at-home mother married to a prominent psychiatrist, it's a far cry from the damaged child she used to be. But her world is shaken when her four-year-old son befriends a little girl at a nearby lake, who vanishes under the water. And when Heike dives in after her, there's no sign of a body.Desp...