As four-year-old Sunny Exley drowns in the icy waters off a luxury beach house, her father, Nick, smokes weed on the shore and her mother, Caroline, is lost in the arms of a lover. Hidden on nearby boulders, rent-a-cop Vernon Saul watches the child die and chooses to act only when it is too late.
Her Saturday night started normally. Recently separated from her husband, Ali has been persuaded by her friends to go on a date with a new man. She is ready, she is nervous, she is excited. She is about to take a step into her new future. By Sunday morning, Ali’s life is unrecognisable. She wakes, and she knows that something is wrong. She is home, she is alone, she is hurt and she has no memory of what happened to her.