At 8.15 am, a commuter plane carrying forty-seven passengers crashes into a building in Los Angeles. The LAPD's first priority is to allay fears that this is another terrorist outrage. Their second is to explain the bizarre mystery they discover in the debris. An extra, unidentified body has been found in the wreckage - but there is no trace of another woman who was supposedly on the flight. To answer the riddle, Lieutenant Peter Decker and his team will have to dig back through three decades of tragic history to uncover the evil behind these crimes and what they find challenges their most basic assumptions about truth, guilt and justice.