A breathtaking flight. A dead passenger. A sky that won't give up its secrets. When flight attendant Amelia Hart boards the overnight route from Denver to Reykjavik, the biggest worry is whether the aurora will appear for the passengers in window seats. But somewhere over the North Atlantic, under ribbons of ghost-green light, a man in seat 21A stops breathing-and nothing about his death fits the calm of the cabin. As the crew moves from routine to investigation, small details refuse to stay quiet: a black volcanic stone under a seat, a basalt ring with a fresh scrape, a seatbelt knotted wrong, and a parka heavy enough to hide a secret. When Icelandic inspector Erlendur Svein meets the plane at the gate, what began as a midnight emergency becomes a web of family history, jealousy, and betrayal stretching from coastal villages to the modern airline aisle. Every passenger carries a story. Some tell theirs. One never will. Inside this haunting, atmospheric mystery you'll find: A locked-room crime at thirty-seven thousand feet where every second and every seat matters Richly drawn Icelandic landscapes steeped in folklore, silence, and the weight of old names A crew caught between duty and conscience as they guard the living and document the dead Layered clues that unfold through human hands, not machines-objects, fibers, sound, and silence An ending that brings justice with heartbreak, not triumph The northern lights burn overhead, cold and beautiful. Below them, in the narrow aisles of a plane still in flight, truth waits for its turn to land. For readers who love intelligent cozy suspense, vivid sensory detail, and the quiet courage of ordinary people under extraordinary pressure, this novel delivers a mystery as luminous and cold as the Arctic sky.