When Emily Kane arrives at her sister Carrie's house, she finds the front door unlocked and no one inside. Dinner's cooking, the TV's on. Carrie, her husband and their two daughters are gone. When the police draw a blank, Emily asks missing persons investigator David Raker to find them. But as he gets closer to the truth, Raker begins to uncover evidence of a sinister cover-up, spanning decades and costing countless lives.