May, 1910. As Halley’s Comet blazes across the sky, Nancy is sent to live in a shadowy Suffolk house with a grandfather she’s never met. The rules are strict—curtains closed, no going outside, and no one can know she or her mother are there.
But when Nancy discovers a hidden observatory and sees her mother and grandfather sneaking out each night, questions begin to mount. Where are they going? And what are they hiding?
As she uncovers buried secrets and long-held lies, Nancy must risk everything to reveal the truth.