When Alaskan billionaire Finn Grant is killed after someone sabotages the engine on his Piper plane, the question is not who had the motive, but rather who did not. Grant was not a popular man, but he was a successful one. His latest venture, an air freight service, was booming. But what kind of freight was he moving, and where? The answers lead Kate Shugak to her most challenging case yet, from the fateful wreckage to family secrets to full-scale conspiracy.