It's New Year's Eve, 1972, when a boat pulls up to the Maiden Rock lighthouse with relief for the keepers. But no one greets them. When the entrance door, locked from the inside, is battered down, rescuers find an empty tower. A table is laid for a meal not eaten. The Principal Keeper's weather log describes a storm raging round the tower, but the skies have been clear all week. And the clocks have all stopped at 8:45.

Two decades later, the wives who were left behind are visited by a writer who is determined to find the truth about the men's disappearance. Moving between the women's stories and the men's last weeks together in the lighthouse, long-held secrets surface and truths twist into lies as we piece together what happened, why, and who to believe.