On the remote Hong Kong beach where they are camping, bickering parents and their lonely teenage daughter awaken at sunrise to a strange sight — a dozen women suddenly on the shore. They seem to have washed in from the sea. Fifteen-year-old Sarah, known as Xixi, tries befriending them, and she snaps a cell phone image of a beautiful young woman she calls Mary. Soon after, Xixi, believing she has a connection with Mary, posts the photo on Facebook, triggering an online narrative she can neither comprehend nor control. Meanwhile, Jacob and Leah, distracted by their failing marriage, must also deal with the fury of an absent older daughter, Rachel, and a looming new SARS epidemic in Hong Kong. As fear and paranoia settle over the city, isolated Xixi grows more desperate to save Mary from her doomed circumstances. She dares herself to be brave, and take a risk; her action is perilous. (From HarperCollins)