It's been two years since Sarah and Howard Renshaw's teenage daughter, Emma, disappeared. Despite the fact that almost everyone else thinks Emma was murdered, the Renshaws are certain that she will return home safe and sound. British detectives Diane Fry and Ben Cooper have been assigned the case, but their investigation is hampered by several strange occurrences. Then one of Emma's former roommates is murdered. Could that crime be tied to Emma's disappearance?