On the face of it, Emma and Nina have very little in common. Isolated and exhausted by early motherhood, Emma finds her confidence is fading fast. Nina--sophisticated, generous, effortlessly in control--seems to have all the answers. It's easy to see why Emma is drawn to Nina. But what does Nina see in her? A seemingly innocent friendship slowly develops into a dangerous game of cat and mouse as Nina eases her way into Emma's life. Soon, it becomes clear that Nina wants something from the unwitting Emma--something that might just destroy her.