Fay Morgan and Nelson Nilsson have each arrived in Inuvik, Canada -- 120 miles north of the Arctic Circle -- searching for answers about a family member: Nelson for his estranged older brother, Fay for her disappeared grandfather. They soon learn that these two men have an unexpected link -- a hidden share in one of the greatest enduring mysteries of polar exploration. This is the riddle of the 'Arnold 294' chronometer, which reappeared in Britain over a hundred years after it was recorded as lost in the Arctic with the ships and men of Sir John Franklin's Northwest Passage expedition. The secret history of this elusive timepiece, Fay and Nelson will discover, ties them and their families to a journey that echoes across two centuries.