Auction house appraiser Jude leaves London for her dream job at Starbrough Hall, an estate in the countryside, examining and pricing the manuscripts and instruments of an eighteenth-century astronomer. She is welcomed by Chantal Wickham and Jude feels close to the old woman at once: they have both lost their husbands. Hard times have forced the Wickham family to sell the astronomer's work, their land and with it, the timeworn tower that lies nearby. The tower was built as an observatory for astronomer Anthony Wickham and his daughter Esther, and it served as the setting for their most incredible discoveries.